All, as with any major OS update (Android 11, Android 12), back up your data to Samsung Cloud and perform a factory reset on your device... Cache files from old OS versions sometimes, and oftentimes get left behind which can cause issues, a lot, of what you are describing. It is a pain to go through resetting and setting up your devices again, however, Samsung Cloud does help ease the burden of getting most, if not all of your files back...
I promise most of the issues will be resolved, as you'll be starting with a clean slate, and can see which apps/settings/are new and actually work, and which ones may have been residual files left over...
Good Tip. While it may not be possible for every one to do it due to amount of data on device, If you can afford it , a master reset would give you a clean slate to work with.
