So, I decided to finally get Puppy Linux for my Raspberry Pi...and tested Pico-8 on it.
Conclusion: the dyn executable works, but not the main one. Not really sure why though since Raspup is based around Raspbian/RaspPiOS packages and stuff.

Still works though. Still works.

Tested with Raspup 8.2.1 btw. Forgot to mention that.