i had the same issues with my iphone 5 bought 5 years ago... 3 years ago the screen got that pinkish tint at first... after some more time the "healthy" spaces on the screen started to turn green... so it was a mix of green and pink tints on the screen... but it was working perfectly without any problem more than that discoloration... 2 months ago i swapped the screen and the phone it's still working perfectly, but it lived with the pink screen for 3 years aproximately without problems (i changed the screen because those colors made me mad, im a little OCD hehe)