https://wccftech.com/xbox-series-s-runs-watch-dogs-legion-at-dynamic-1080p-rt-is-slightly-better-on-pc-than-on-consoles/

Ubisoft recently announced some details on the next-gen enhancements coming to the likes of Watch Dogs Legion, Assassin's Creed Valhalla, Immortals Fenyx Rising, Riders Republic, Far Cry 6, Rainbow Six Siege, and For Honor. However, we were able to receive extra tidbits of information from Galvin Whitlock, Lead Programmer at Ubisoft, such as the target resolution for the game on Microsoft's smaller, cheaper, and less powerful next-gen console.

The Highest target resolution on Xbox Series S for Watch Dogs: Legion will be 1080p (dynamic).