PHONE GLITCH (IPHONE11PROMAX)

So im just chilling watching netflix and out of nowhere the color of my screen changes but i noticed the top part didn’t, so i swipe out of netflix and see if it’s my brightness then my phone started to glitch green, so i put the brightness back, mind you i just got a battery replacement at best buy for $100 last month. Anyways i was searching up how to fix this and im about to update my phone bc it said i should try that but i have reset, cooled down, turned off auto brightness, everything but update and plug my phone. im currently updating it as i type this but its preparing the update rn so i decided to ask yall, WHAT IS HAPPENING TO MY PHONE? Every time i lower my brightness it glitches green again and it is not hot or anything the phone is perfect temperature. I have reset, troubleshot, force reset, shut down my phone and it does not work.