I'm very proud to announce that 98% of my steam titles play perfect on my gaming Linux setup. I main Pop!_os and I love it so much.
Tarkov runs perfect but its 3rd party anti cheat doesn't support Linux so it's not playable online.
Certain games from the Xbox Microsoft store like halo wars 2 cannot run on Linux, PC or Xbox only. Very few exceptions. Couldn't he happier. I highly recommend it
I've had issues with vr games, mostly playable, but way less consistent and I've gotten motion sick when I haven't on windows. Though I last tried a year or so ago, so it could have improved