Actually, I'm just talking about desktop gaming. I installed Linux Mint 21 "Vannessa" on a drive, immediately went to the software manager and got the Flatpak version of Steam, and logged in. Then I picked Proton 6.3 as my default (experimental works as well, but I use this one for reasons), installed the game and it works out of the box.
Linux gaming has gotten that easy in the last six months. I now no longer have on a single game that doesn't work on Linux. That likely means all my game will work on the deck!