it doesnt seem to be that way, https://www.gamingonlinux.com/2022/01/easy-anti-cheat-not-as-simple-as-expected-for-proton-and-steam-deck/

which should be a built-in feature.

why should it? It’s pretty clear that GNOME does it’s own thing than copy the rest of the OSs. They do copy some stuff though. And at least you can install extensions and the extensions that exist are pretty cool, even if I just run vanilla GNOME.