Reportedly, Samsung has turned to hardware and software refinements to pull even better performance from its 108 MP ISOCELL HM3 camera sensor. The improvements will debut in the Galaxy S22 Ultra, also thought to be called the Galaxy S22 Note.
https://www.notebookcheck.net/Samsung-Galaxy-S22-Ultra-108-MP-ISOCELL-HM3-camera-improvements-outlined-in-new-leaks.588752.0.html