Apple will introduced a fancy ring-light feature in macOS 26.2.
Here is a very simple preset that gives you a super bright ring light on current macOS versions. It works on all HDR capable Apple Displays
To show the ring-light press cmd+opt+ctrl+R
To hide the ring-light press cmd+opt+ctrl+R again
ring-light.bttpreset (30.8 KB)
FYI: this is just for fun I don't think it will be useful 