diff --git a/core/libs/prx/libSceAgc/Unimplemented.cpp b/core/libs/prx/libSceAgc/Unimplemented.cpp
index e53a08cb3..3e405bd60 100644
--- a/core/libs/prx/libSceAgc/Unimplemented.cpp
+++ b/core/libs/prx/libSceAgc/Unimplemented.cpp
@@ -150,4 +150,16 @@ int APS5_VABI sceAgcUnknown_y5K5tPktiL8() {
  return 0;
 }
 
+APS5_EXPORT("dbOlWdppb4o", sceAgcUnknown_dbOlWdppb4o);
+int APS5_VABI sceAgcUnknown_dbOlWdppb4o(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+APS5_EXPORT("vieBRwlh1Lw", sceAgcUnknown_vieBRwlh1Lw);
+int APS5_VABI sceAgcUnknown_vieBRwlh1Lw(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
 }
diff --git a/core/libs/prx/libSceFont/src/Unimplemented.cpp b/core/libs/prx/libSceFont/src/Unimplemented.cpp
index c1b833af5..56e6eb21b 100644
--- a/core/libs/prx/libSceFont/src/Unimplemented.cpp
+++ b/core/libs/prx/libSceFont/src/Unimplemented.cpp
@@ -457,6 +457,16 @@ int APS5_VABI sceFontWritingLineWritesOrder() {
     return 0;
 }
 
+int APS5_VABI sceFontGraphicsDrawupFillTextureImageObject(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceFontGraphicsDrawupFillTexturePatternObject(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 }
 
 #pragma GCC visibility pop
diff --git a/core/libs/prx/libSceHttp2/Export.cpp b/core/libs/prx/libSceHttp2/Export.cpp
index 911b65730..adaa00e78 100644
--- a/core/libs/prx/libSceHttp2/Export.cpp
+++ b/core/libs/prx/libSceHttp2/Export.cpp
@@ -214,4 +214,24 @@ int APS5_VABI sceHttp2GetMemoryPoolStats() {
     return 0;
 }
 
+int APS5_VABI sceHttp2CookieFlush(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceHttp2CreateCookieBox(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceHttp2SetCookieBox(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceHttp2SetRequestNoContentLength(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 }
diff --git a/core/libs/prx/libSceNet/Export.cpp b/core/libs/prx/libSceNet/Export.cpp
index 19a4b22bd..456301ccf 100644
--- a/core/libs/prx/libSceNet/Export.cpp
+++ b/core/libs/prx/libSceNet/Export.cpp
@@ -911,4 +911,10 @@ int APS5_VABI sceNetResolverStartAton(int rid, const void* addr, char* hostname,
     }
     return 0;
 }
+
+int APS5_VABI sceNetResolverGetError(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 }
diff --git a/core/libs/prx/libScePad/Export.cpp b/core/libs/prx/libScePad/Export.cpp
index f2437a5a5..adc42a6b7 100644
--- a/core/libs/prx/libScePad/Export.cpp
+++ b/core/libs/prx/libScePad/Export.cpp
@@ -233,4 +233,10 @@ int APS5_VABI scePadSetVibrationTriggerEffectWeakWhileEmbeddedMicInUse(bool enab
  return PAD_OK;
 }
 
+APS5_EXPORT("fCWdlnmB1Ks", scePadUnknown_fCWdlnmB1Ks);
+int APS5_VABI scePadUnknown_fCWdlnmB1Ks(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
 }
diff --git a/core/libs/prx/libSceSsl/Export.cpp b/core/libs/prx/libSceSsl/Export.cpp
index 4cca48fc7..5ef04eacb 100644
--- a/core/libs/prx/libSceSsl/Export.cpp
+++ b/core/libs/prx/libSceSsl/Export.cpp
@@ -73,4 +73,34 @@ int APS5_VABI sceSslGetMemoryPoolStats() {
     return 0;
 }
 
+int APS5_VABI sceSslFreeSslCertName(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceSslGetIssuerName(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceSslGetNameEntryCount(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceSslGetNameEntryInfo(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceSslGetPem(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sceSslGetSubjectName(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
 }
diff --git a/core/libs/prx/libSceSystemService/Export.cpp b/core/libs/prx/libSceSystemService/Export.cpp
index 01a6365a5..faef48204 100644
--- a/core/libs/prx/libSceSystemService/Export.cpp
+++ b/core/libs/prx/libSceSystemService/Export.cpp
@@ -130,4 +130,29 @@ int APS5_VABI sceSystemServiceLaunchPlayerDialog(const void* param) {
  return SYSTEM_SERVICE_OK;
 }
 
+int APS5_VABI sceSystemServiceDisableMusicPlayer(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+int APS5_VABI sceSystemServiceOpenChallengeActivity(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+int APS5_VABI sceSystemServiceOpenTournamentOccurrence(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+int APS5_VABI sceSystemServiceReenableMusicPlayer(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+int APS5_VABI sceSystemServiceShowControllerSettings(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
 }
diff --git a/core/libs/prx/libSceUserService/Export.cpp b/core/libs/prx/libSceUserService/Export.cpp
index 1695f4546..1ded3463e 100644
--- a/core/libs/prx/libSceUserService/Export.cpp
+++ b/core/libs/prx/libSceUserService/Export.cpp
@@ -48,6 +48,14 @@ int APS5_VABI sceUserServiceGetAccessibilityZoomEnabled(int user_id, int32_t* zo
  return USER_SERVICE_OK;
 }
 
+int APS5_VABI sceUserServiceGetAccessibilityZoomFollowFocus(int user_id, int32_t* zoom_follow_focus) {
+ if (zoom_follow_focus == nullptr || user_id != USER_SERVICE_INITIAL_USER_ID) {
+  return USER_SERVICE_ERROR_INVALID_ARGUMENT;
+ }
+ *zoom_follow_focus = 0;
+ return USER_SERVICE_OK;
+}
+
 int APS5_VABI sceUserServiceGetAgeLevel(int user_id, uint32_t* age_level) {
  (void)user_id;
  (void)age_level;
diff --git a/core/libs/prx/libc/src/HeapDiagnostics.cpp b/core/libs/prx/libc/src/HeapDiagnostics.cpp
index 0288d5c0a..16910f8a1 100644
--- a/core/libs/prx/libc/src/HeapDiagnostics.cpp
+++ b/core/libs/prx/libc/src/HeapDiagnostics.cpp
@@ -48,4 +48,22 @@ int32_t APS5_VABI sceLibcUnknown_BnMAMrsfVWo(void) {
  return 0;
 }
 
+APS5_EXPORT("OQ-dzhlnM28", sceLibcInternalExtUnknown_OQ_dzhlnM28);
+int APS5_VABI sceLibcInternalExtUnknown_OQ_dzhlnM28(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+APS5_EXPORT("qBS714-Jr3g", sceLibcInternalExtUnknown_qBS714_Jr3g);
+int APS5_VABI sceLibcInternalExtUnknown_qBS714_Jr3g(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
+APS5_EXPORT("tB59hFLH3SA", sceLibcInternalExtUnknown_tB59hFLH3SA);
+int APS5_VABI sceLibcInternalExtUnknown_tB59hFLH3SA(void) {
+ NotImplemented_nid_no_patch(__func__);
+ return 0;
+}
+
 }
diff --git a/core/libs/prx/libkernel/File/src/Stdio.cpp b/core/libs/prx/libkernel/File/src/Stdio.cpp
index cf4c3a305..4d597c117 100644
--- a/core/libs/prx/libkernel/File/src/Stdio.cpp
+++ b/core/libs/prx/libkernel/File/src/Stdio.cpp
@@ -487,4 +487,14 @@ int APS5_VABI sceKernelUtimes_nid_postfix(const char* path, const KernelTimeval*
     return 0;
 }
 
+int APS5_VABI utimes_nid_postfix(const char* path, const KernelTimeval* times) {
+    if (const int error = PathError(path)) return PosixFailure(error);
+    return PosixResult(sceKernelUtimes_nid_postfix(path, times));
+}
+
+int APS5_VABI fsync_nid_postfix(int fd) {
+    if (sceKernelFsync(fd) != 0) return PosixFailure(errno);
+    return 0;
+}
+
 }
diff --git a/core/libs/prx/libkernel/Pthread/Posix/Thread.cpp b/core/libs/prx/libkernel/Pthread/Posix/Thread.cpp
index fc9fd94d8..b2281ac47 100644
--- a/core/libs/prx/libkernel/Pthread/Posix/Thread.cpp
+++ b/core/libs/prx/libkernel/Pthread/Posix/Thread.cpp
@@ -5,6 +5,7 @@
 #include "prx/libc/include/General.hpp"
 #include "../include/Pthread.hpp"
 #include "Common.hpp"
+#include "prx/libkernel/KernelErrors.hpp"
 #include <thread>
 
 extern "C" {
@@ -39,6 +40,18 @@ void APS5_VABI pthread_exit_nid_postfix(void* value) {
     scePthreadExit(value);
 }
 
+int APS5_VABI scePthreadGetschedparam(Pthread thread, int* policy, KernelSchedParam* param) {
+    if (!policy || !param) return SCE_KERNEL_ERROR_EINVAL;
+    *policy = GUEST_SCHED_FIFO;
+    return scePthreadGetprio(thread, &param->sched_priority);
+}
+
+int APS5_VABI scePthreadSetschedparam(Pthread thread, int policy, const KernelSchedParam* param) {
+    (void)policy;
+    if (!param) return SCE_KERNEL_ERROR_EINVAL;
+    return scePthreadSetprio(thread, param->sched_priority);
+}
+
 int APS5_VABI pthread_getschedparam_nid_postfix(Pthread thread, int* policy, KernelSchedParam* param) {
     if (!policy || !param) return PosixThread::GUEST_EINVAL;
     *policy = GUEST_SCHED_FIFO;
diff --git a/core/libs/prx/libkernel/Unimplemented.cpp b/core/libs/prx/libkernel/Unimplemented.cpp
index c969fc55e..025f33969 100644
--- a/core/libs/prx/libkernel/Unimplemented.cpp
+++ b/core/libs/prx/libkernel/Unimplemented.cpp
@@ -30,4 +30,46 @@ int APS5_VABI sceKernelUnknown02(void) {
     NotImplemented_nid_no_patch("0D4-FVvEikw");
     return 0;
 }
+APS5_EXPORT("B2n8aDorSH4", sceKernelUnknown_B2n8aDorSH4);
+int APS5_VABI sceKernelUnknown_B2n8aDorSH4(void) {
+    NotImplemented_nid_no_patch("B2n8aDorSH4");
+    return 0;
+}
+
+APS5_EXPORT("NH6xARDOVv8", sceKernelUnknown_NH6xARDOVv8);
+int APS5_VABI sceKernelUnknown_NH6xARDOVv8(void) {
+    NotImplemented_nid_no_patch("NH6xARDOVv8");
+    return 0;
+}
+
+APS5_EXPORT("PZQhiiLXRFs", sceKernelUnknown_PZQhiiLXRFs);
+int APS5_VABI sceKernelUnknown_PZQhiiLXRFs(void) {
+    NotImplemented_nid_no_patch("PZQhiiLXRFs");
+    return 0;
+}
+
+int APS5_VABI sceKernelFchmod(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI fchmod_nid_postfix(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI futimes_nid_postfix(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI recvmsg_nid_postfix(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
+
+int APS5_VABI sendmsg_nid_postfix(void) {
+    NotImplemented_nid_no_patch(__func__);
+    return 0;
+}
 }
diff --git a/docs/dev/TechnicalDebt.md b/docs/dev/TechnicalDebt.md
index 02ea84a84..058a342c8 100644
--- a/docs/dev/TechnicalDebt.md
+++ b/docs/dev/TechnicalDebt.md
@@ -60,6 +60,11 @@ Throughout the project, every function at every stage either **does exactly what
 - [BnMAMrsfVWo](../../core/libs/prx/libc/src/HeapDiagnostics.cpp) (libc) - unknown name, signature
 - [scePngEncEncode](../../core/libs/prx/libScePngEnc/Export.cpp) (libScePngEnc) - whether rows may stay unfiltered when `filter_type` names a subset of the filters is unknown; as in shadPS4, they may only for 0 and for the all-filters mask
 - AudioIn, NpSessionSignaling and PlayerInvitationDialog exports added without an implementation have assumed signatures
+- [dbOlWdppb4o, vieBRwlh1Lw](../../core/libs/prx/libSceAgc/Unimplemented.cpp) (libSceAgc) - unknown name, signature
+- [OQ-dzhlnM28, qBS714-Jr3g, tB59hFLH3SA](../../core/libs/prx/libc/src/HeapDiagnostics.cpp) (libSceLibcInternalExt, implemented in libc) - unknown name, signature
+- [fCWdlnmB1Ks](../../core/libs/prx/libScePad/Export.cpp) (libScePad) - unknown name, signature
+- [B2n8aDorSH4, NH6xARDOVv8, PZQhiiLXRFs](../../core/libs/prx/libkernel/Unimplemented.cpp) (libkernel) - unknown name, signature
+- Font, Http2, Net, Ssl, SystemService and libkernel exports imported by PPSA12544 and added without an implementation have unknown signatures
 - [libSceAudioPropagation](../../core/libs/prx/libSceAudioPropagation/Export.cpp) (libSceAudioPropagation) - signatures and struct descriptors recovered from PPSA21567's calls (#481), not from documentation. The system options layout is unknown (only checked for non-null); the fourth argument of `sceAudioPropagationSourceCalculateAudioPaths` is unknown; `sceAudioPropagationSourceGetAudioPath` is assumed to output an 8-byte path handle. The meaning of the `RenderInfo` word at +0x28 is unknown (PPSA21567 and PPSA21564 pass 2); only 2 is accepted. Both titles pass one `RenderInfo` per call: a count of 0 throws, and larger counts are handled element by element without proof. No error code is known, so invalid input throws instead of returning one
 - [sceAvPlayerStartEx](../../core/libs/prx/libSceAvPlayer/Export.cpp) (libSceAvPlayer) - start info layout unknown; it is ignored and playback starts as with `sceAvPlayerStart`
 - [sceAvPlayerInit / sceAvPlayerInitEx](../../core/libs/prx/libSceAvPlayer/src/Player.cpp) (libSceAvPlayer) - behaviour without a memory replacement unknown; frame and sample buffers then come from the guest heap