iPhone flashing white, then completely turned white

I was just scrolling on youtube shorts and notice that my phone is flashing white, It started small but then gets more noticeable. I immediately search why its happening and what could be the solution, I turned off the auto brightness and it fixed it for a bit but then it started to act up again. I did the force restart but its not working. Right now my phone is still completely white even after multiple force restart. Do I need to replace the LCD? or what could be my problem? (im using iphone 13 pro max)