1300€ is way too much for 12MPix. I assume the 200MPix mode is locked for 3'rd party camera apps. Atleast give us AEB RAW bracketing. The bracketing should be just batch list compleatly customizable in WB, Shutter, ISO. With compleatly i mean the EV step is not fixed from 1 frame to another.
200 MP mode is easily accessible on S23 Ultra in stock camera app in default photo mode, you just have to select "4:3 200 MP" in aspect ratio option.