That's why they suggested checking protondb, it really depends on the type of games you play. All the games I play work fine on Linux, but if you want to play Fortnite or League of legends then you're out of luck.
As I have learned from experience, ProtonDb means nothing. You can have slightly different hardware from SteamDeck and the game may not work for you. I am not talking theory, I am talking from real experience using latest hardware and multiple retires with CachyOS, Bazzite etc.
Protondb includes reports from all sorts of hardware.