Random screen dimming

I have a Pixel 10 pro. Same thing. But extra dim feature was removed as a toggle and moved to the brightness slider.
Are you saying that you still see your screen dimming even when changing the Colors option to Natural?
 
Ok, thanks for sharing that. I think that may only kick in if the screen brightness is set to 100% (which I never do -- mine is usually around 80% at the most, which is probably why I've never seen it happen). The OP mentioned originally that their brightness is set to 85%, so I think their issue was fundamentally different from what you're describing (and is also why my suggestion seems to have worked for them).