i have the samsung s20 5g, i use tiktok a lot. i now have clear outlines of the like, comment and share button permanently on the screen. had my phone since about july/august. I am currently talking to my provider (vodafone) to see what can be done, i will keep updated if i get covered etc
it can be authorised under warranty. has to be booked in for repair and then pictures will be took and samsung can decide to replace screen under warranty if wanted too. in my experience 9 times out of 10. this will be replaced.
unfortunately this is a problem with oled displays. however i have only experienced this on my s20 and my old s9. I have people with an iphone xs and other iphones with oled panels and they have had no issues.. i think i will be upgrading early for an iphone