This sounds like screen burn-in.
Your phone might need an exorcism.
You should replace the screen.
Have you tried removing the screen protector to see if it’s still there?
I have the same issue on my iPhone 12 Pro.
Gentry said:
I have the same issue on my iPhone 12 Pro.
Yeah, mine is a 12 Pro too.
It’s probably the glue from the screen edges. This happened with older iPhones too.
Try changing your wallpaper to something darker.
Could be burn-in. Get it checked out and see if replacing the screen helps.
We can only hope it gets better.
Mine does that too, but only at certain times.
Sounds like burn-in to me.
Check how it looks in light mode. If there’s a yellow tint, it might be the glue.
I have this too. It looks just like this: https://youtube.com/shorts/aH8zTIg9too?feature=shared
That sounds frustrating to deal with.