Chosen Solution
I’ve had my iPhone 7 for quite some time and I’ve noticed that I’m missing a button for auto brightness. I know that it got moved to screen accommodations but it only shows “auto brightness may effect battery life” I updated to the iOS 13 beta and I found the auto exposure switch that I’m guessing does the same thing but I’m still not seeing the brightness dynamically change. Is this a software issue with the iPhone 7?
Has screen been replaced before? Could be damaged front camera assembly as that has the auto brightness sensor on it.