I don't understand why more device don't have ambient light sensors built into them. Phones have been doing this amazingly for 15+ years but almost no displays do.
I think I saw a TV a while back that did, but that's 1 out of the 10 billion models out there.
My cheap Benq monitor has a ambient light sensor, and I disabled it because it sucks. It never manages to set the exact brightness I would consider right for me in every scenario.
Instead I much prefer to control it manually via the mouse scroll wheel and DDCI, that way I can adjusted exactly to my liking every moment of the day.
On phones this feature makes sense because as you walk and move around the ambient brightness shining on the screen changes rapidly but on a indoor PC monitor in a room/office, the ambient light is relatively stable because you can control it via light switches or window blinds, so manual control is fine.
My Dell laptop had one, which was very poorly done. Sitting in a dimly lit room, I would catch it self adjusting every several seconds. I ended up disabling it.
I think I saw a TV a while back that did, but that's 1 out of the 10 billion models out there.