Unravel 2
With the exception of Sea of Solitude, all these games now have 120Hz support on Xbox Series X. The same is true on Xbox Series S, but with one key difference. In order for 120Hz to be achieved, the resolution of some games needs to be dropped. So Series S owners won't have 120Hz support enabled by default; they just need to turn it on if they don't mind taking the resolution hit. As for Sea of Solitude, it gets 60Hz support on both consoles.
Larry Hryb, Senior Director Corporate Communications at Microsoft (aka Major Nelson), created the video above demonstrating how to enable FPS Boost for a game using the Xbox interface. It's a quick process and requires turning on both Auto HDR and FPS Boost.