You don’t need to rebuild the editor. Please run this:
Engine\Build\BatchFiles\RunUAT.bat BuildPhysX -SkipCreateChangelist -SkipSubmit -TargetPlatforms=Linux-aarch64-unknown-linux-gnueabi -TargetConfigs=debug
after that edit GetPhysXLibraryMode() function in Engine\Source\ThirdParty\PhysX3\PhysX.Build.cs and make it always
return PhysXLibraryMode.Debug;
after that rebuild the ARM64 binary (repackage). Note that the Build.cs change will affect building binaries for Windows too, so you may want to undo it later (or guard so it applies to cases when Target.Architecture.StartsWith(“aarch64”) is true).