After last update (android 11, one UI 3.0) all notifications and sounds work except for incoming calls ringtones. Tried everything. I can hear the sound when browsing library. Both speakers are fine. Screen lights up normally when receiving call and no sound..
Just as one of the first steps @Tosuia please go into Settings, Apps, Phone and Storage and clear cache.
Daily Driver > Samsung Galaxy s²² Ultra 256Gb in Phantom Black.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.