This is interesting, Bazzite abandoning Discover was the final straw for me to dump Bazzite on my TV pc and move back to Kubuntu. I don’t have GameMode anymore but the feeling of being in control is worth it so won’t be switching back

I use Bottles for this. Takes care of all the technical wine stuff I don’t understand and leave me with 1 “C:/” drive everything can be installed in to rather than having one for each app/game like Lutris does

You could try searching Archive.Org for Linux native games