The problem with the patch referenced here is that it doesn’t patch the pci.c file used by the default OpenWRT 23.05.2 build. Try this one:
--- /dev/null
+++ b/package/kernel/ath10k-ct/patches/999-0001-fix-e750-reset-5g-crash.patch
@@ -0,0 +1,11 @@
+--- a/ath10k-5.15/pci.c
++++ b/ath10k-5.15/pci.c
+@@ -2571,7 +2571,7 @@
+ goto out;
+ }
+
+- schedule();
++ //schedule();
+ }
+
+ ret = -ETIMEDOUT;