With streams new Proton system that lets us run the Windows games on Linux and sill in work for the M1 macs why not add that kind of thing to your app? The wine emulator is open score so that sound be easy.

I would tend to agree- when I get a steam deck this quarter, I will be using that quite a lot as my platform.
If you came up with a native client or at least built in proton or whatever you have to do to support popular hardware, I guarantee I will be more likely to buy from your store going forward. If it's a hassle that could easily be resolved on your end, makes me disinclined to spend $ here.