So here is my project layout:
(Note: That .dylib file is important here)
But when I export, the dylib file isn't recognised but is recognised when play testing?
If you don't understand what I am saying, let me try and say that again but better:
When I play test, the GameSDK launches the Rich Presence:

But when I play the exported .app executable it just crashes meaning that it might not find the DC GameSDK .dylib
If I run the raw binary itself (the application binary) then Console outputs this:
arguments
0: /Users/USERNAME/2D Ragdoll/exports/2D Ragdoll Test.app/Contents/MacOS/2D Ragdoll Test
Current path: /Users/USERNAME
Godot Engine v3.3.1.stable.mono.official - https://godotengine.org
OpenGL ES 3.0 Renderer: Apple M1
OpenGL ES Batching: ON
UNSUPPORTED (log once): POSSIBLE ISSUE: unit 1 GLD_TEXTURE_INDEX_2D is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable
2021-05-24 19:21:07.827 2D Ragdoll Test[43985:3088728] Error loading /Library/CoreMediaIO/Plug-Ins/DAL/obs-mac-virtualcam.plugin/Contents/MacOS/obs-mac-virtualcam: dlopen(/Library/CoreMediaIO/Plug-Ins/DAL/obs-mac-virtualcam.plugin/Contents/MacOS/obs-mac-virtualcam, 262): no suitable image found. Did find:
/Library/CoreMediaIO/Plug-Ins/DAL/obs-mac-virtualcam.plugin/Contents/MacOS/obs-mac-virtualcam: code signature in (/Library/CoreMediaIO/Plug-Ins/DAL/obs-mac-virtualcam.plugin/Contents/MacOS/obs-mac-virtualcam) not valid for use in process using Library Validation: mapping process has no Team ID and is not a platform binary
Registered camera FaceTime HD Camera with id 1 position 0 at index 0
Mono: Log file is: '/Users/USERNAME/Library/Application Support/Godot/app_userdata/2D Ragdoll/mono/mono_logs/2021-05-24_19.21.08_43985.log'
handle_crash: Program crashed with signal 11
Dumping the backtrace. Please include this when reporting the bug on https://github.com/godotengine/godot/issues
[1] 1 libsystem_platform.dylib 0x00007fff203b6d7d _sigtramp + 29
[2] 2 ??? 0x0000000000000210 0x0 + 528
[3] 3 libsystem_malloc.dylib 0x00007fff889c4000 virtual_default_zone + 0
-- END OF BACKTRACE --
Please help :(