not sure what you mean. Please expand. Thanks.
I use recalbox as a retrogaming console/emulator
I know i can play pico8 files with it (emulator https://github.com/Jakz/retro8)
As it is an open-source system, games needs to be open-sources to be included.
So if you choose an open-source license , the game could be included in Recalbox.
Like these ones :
https://wiki.recalbox.com/en/emulators/included-games