Did you enable Proton in your account settings? If not, you're only going to be able to play native Steam games (which are both meh, and are at the mercy of how much the devs maintained it, or are incomplete like the Binding of Isaac one not having an Afterbirth DLC linux version so without Proton, you wouldn't be able to access it).
If you haven't and are still on Linux, go to your account, find the compatability tab, and check "Enable Steam Play for all titles". Steam will ask to restart, and after a restart, you'll be good
Did you enable Proton in your account settings? If not, you're only going to be able to play native Steam games (which are both meh, and are at the mercy of how much the devs maintained it, or are incomplete like the Binding of Isaac one not having an Afterbirth DLC linux version so without Proton, you wouldn't be able to access it).
If you haven't and are still on Linux, go to your account, find the compatability tab, and check "Enable Steam Play for all titles". Steam will ask to restart, and after a restart, you'll be good
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Yeah, before I knew that it's better to just use Proton over the Native Linux game, it threw me for a loop too NGL