Valve announced a change for Steam today that will make things a lot clearer for everyone, as developers will now need to clearly list the kernel-level anti-cheat used on Steam store pages.
Now if only they could more clearly communicate when games are playable offline.
This will be helpful for discerning if a game can run on the Steam Deck. There's not many games that don't have verification (Either by Valve or ProtonDB) but for newer games with anticheat it will serve as a good rule of thumb i imagine
Lots of games with anti cheat auto work under wine/proton. The most on top of my head example is Elden ring. Runs fine on my desktop with arch, as well as my steam deck.