6. One-Handed Mode
This feature is not getting any major attention but it could make a difference in the way you use your phone daily. If you are using a phone with a big display like the Galaxy S21 Ultra, this is even more applicable for you.
The new Android 12 one-handed mode makes it easier to hold your phone on one hand only and use your thumb to do the necessary tapping by moving whatever is in the top half of your screen down to the bottom half of your screen. By doing so, everything on your screen is now within the reach of your thumb.