A certain way of dealing with OLED displays should actually be learned and applied, because burn-in can basically be avoided.
Enclosed is a suitable article from Digitec:
https://www.digitec.ch/de...
Quote from Luca in the comments on the question "Is burn-in on mobile phones covered by the warranty?
Important question! For most manufacturers (TV and mobile phones), burn-in is not covered by the warranty. Because burn-in only occurs when the device is used excessively in a way that was not intended. It's as if you were to continuously bang your new football against a concrete wall from a distance of two metres, until after five hours you go back to the seller and complain that the ball has broken.
BUT - manufacturers are very accommodating and repair or replace damaged panels free of charge or very cheaply. Especially in the TV sector. Unfortunately, I know less about smartphones.