This is one of those obvious settings, but sometimes I miss certain features even if they're right in front of me...So thought Id share- I used to have AOD on but turned it off as it was a little annoying at night.
If you go to Settings > Lock screen and AOD > Always On Display > When to show, change it from Tap to show/Always to Auto.
"Show all the time unless your phone detects that you're sleeping, that it's face down, or that it's in a dark place and hasn't moved for at least 5 minutes." To me, this is useful.
P.S. From reading online, this was taken away at some point, but I can't confirm this. Anyone know if this is true?