I have a feeling and mentioned in some articles that the extra Brightness may be only be compatible with the S22 series.
A list of changes here for other one UI 4.1 devices https://www.sammobile.com/news/all-the-galaxy-s22-camera-features-coming-to-you-with-one-ui-4-1/
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.
Note 10 here, and I really love this phone. After the one UI 4.1 update, the camera auto Brightness does not work ie the camera doesn't switch onto a brighter mode when it is activated.
The phone also lags alot compared to before, and it gets quite warm, with the battery draining quite fast now.
I also preferred the transparent, blurred look of the quick panel and the folders background when open.
Basically, one ui 4.1 has ruined the phone. I wish I had not updated.
I just hope that S-Pen will integrate its functionality with Keep. It'd be really nice to select a notetaking app when you pulled out the S-Pen and not default to Samsung notes, which I barely use, because as you said Keep looks much better and it syncs with my other devices.