

Performance Is about on par with windows for everything dx9 to dx12. Dx8 and earlier I think are not supported by wine.
In general you will be able to play almost all games, as long as they don’t require kernel level anti cheat, but some online games do block Linux users. In the case of tarkov I can’t help, you should read online.
Older games should be fine, personally I played Max Payne 1 an 2 a couple month ago, and the original Hitman series runs better than on windows.
Expect to do some tinkering on some more advanced games. E.g.: Shadow of the Tomb Raider and Alan Wake 2 require the experimental version of proton, God of War Ragnarok requires to enable SteamDeckMode on a config file to disable PlayStationSDK, usually you will find suggestions on protondb.
Some Nvidia proprietary things will not work in games on wine, e.g.: GPU accelerated physix will not work, also on some games dlss will require editing wine’s registry.
Hmmmm
Do you actually need a full fake edid for your usecase? I think you are looking for the
video=
kernel parameter, which forces a port to be active, and adds a mode (resolution and refreshrate) to it’s list of supported modes