Counterstrike and Tarkov because I'm too bad at them to have any fun playing myself, but I really enjoy watching competitive matches or streamers raids here and there.
Also, Dark Souls 1-3 and Skyrim. I've played them all so much and still play through here and there, but I like to watch challenge runs and see all the modded or otherwise ridiculous playthroughs that I don't have the patience to commit to myself.
Have you ever got a friend to play Dark Souls? It's a fun game to watch someone new play it. My late best friend did that with me during the first lockdown, and I got the sense that he was vicariously enjoying the game through me.