Is there a way to get PICO-8 cartridges running on the PocketGo v1? (https://retromimi.com/products/pocketgo-retro-gaming-system)
I've looked on the reddit but I can't find anything.

Probably not. Emulators like tac08 that are made for rg350 also run on pocket go 2, but the v1 has a different architecture and OS so the program can’t run there.