No I haven't noticed anything yet.
are you sure it's a new update?
If you follow the link from your screenshot, the last one is the one from the 7th of December
I'm pretty sure it's new , if you look at the version number it is different (G998BXXS3BUL6). I think they just haven't updated their "notes" yet.
I was reading on another forum, and checked also with my phone with CheckFirm, all Android 12 updates have disappeared from the server, including BUL6. Latest official software for S21 is Android 11.
I guess someone noticed the size of the screwup...