During Xbox's 20th anniversary event, Microsoft announced that over 70 new games will be added to the backwards compatibility program. The backwards compatibility program for me is one of the best parts of the Xbox One and Series X. It's also extremely important to me to be able to carry all your games forward especially so I can consolidate my shelf so I can just have a few consoles on there.
Anyways, some of these games will get FPS boosts and some games that were already part of the program will get boosts as well. Check out the official post from Microsoft about the update for the full list of games and to see which games got updates.
This isn't the entire list but here is just a snippet of games that were added