Now that you mention it: I never realised that protondb only covers games on steam! maybe they should add a way to add nonsteam games.

quite a few of these links are just:

I installed windows game on the steam deck! Heres How I Managed This Herculean Task Using Arcane Magics: just runs the game with wine/proton

Yes, this new iteration of Junk Store will be paid software and will be closed source.

And then I stopped reading.