Very happy to hear that! You will have a blast once you get in the groove and happy for ya.
https://www.xbox.com/en-US/games/optimized#thetable
A lot of games have been delayed but you got a lot to work with esp missing last gen but above is more the window for the next year
Gears of War 5 definitely, they have a next gen upgrade for the Xbox X and loved some Gears.
Ori and the Will of Wisps is the prettiest game on there I think; wish it was on Playstation tbh
Medium (Xbox excl.) but more of a horror puzzle game (great reviews) but not horror like Resident Evil where you're firing off on zombies/bosses with weapons
Assassins Creed Valhalla fell flat on me, but that's been kind of a go-to for next gen games as well if you're into the Viking lore, etc. The combat is a little meh though tbh, but see a lot of people still plugging away on this game.
Games on Gamepass: think all of those above are too excep Valhalla, but these are cross gens I recommend
Doom Eternal (best shooter in a minute)
Star Wars Jedi Order (actually really good combat with the saber as I'm not a Star Wars guy but like the combat)
Titanfall 2 (surprisingly great campaign with good pacing)
The Outer Worlds (similar to Fallout if you've played those, same people made this game)
Resident Evil 7
Read Dead 2 and Witcher 3 definitely if haven't played before (Best rpgs I've played along with GTA 5)
(Witcher 3 is on there but would consider buying Read Dead 2 definitely)
Lemme stop before I list the whole game pass catalog...lol
Have fun and see you in 2022