keep brightness from auto adjusting

Same thing happens to my iPhone 11pro. Even though auto brightness is off it keeps dimming the screen often without any input on my part. In addition I have automatic dark mode (sunset to sunrise), and that too shuts off without me doing anything. I have to keep turning dark mode on. I don't think is a hardware issue. I think is software. Thinking about a full restore to see if that helps.

Settings>General>Accessibility>Display Accommodations>Auto Brightness>Off.

I’ve tried that! it is still adjusting the brightness by itself automatically! SO ANNOYING! what do I do...?!

yes, that’s exactly what’s happening! thank you, elcartero!

I don’t know much about those phones 🤦🏻‍♂️