I have constant problems with my iPhone screen brightness yet every solution apple, or the internet tells me is just wrong…

So my brightness is constantly going down automatically…I have auto brightness turned off…reduce white point also turned off…I have low power mode turned off…and I have a good 78% charge of battery………..YET MY SCREEN BRIGHTNESS IS CONSTANTLY AS A DARK AS THE THE DUNGEONS AND DRAGONS BOARD GAME…what’s most infuriating though is apple is so confident it’s the auto brightness or white point…I have a an iPhone SE 2020. It’s fairly new and is is acting like a 6. Some genius help me yo why my screen brightness is constantly so low and literally can’t do anything but stop using the phone completely and wait for it to be go back up. Thank you.