The issue has been discussed many times.
Mydrivers has published another story of an iPhone 14 Pro Max owner whose screen burned out. The smartphone was sent to a service center, however, after testing, Apple stated that “the smartphone has no problems and can be used normally.”
According to the test report received by the owner of the smartphone, after returning to the factory, Apple technicians conducted a scheduled diagnostic of the device, the content of which includes updating the software, restoring and force restarting the device. Obviously, the problem of a burnt screen after these manipulations has not gone away.
iPhone 14 Pro Max screens continue to burn in, but Apple doesn’t see it as a problem
Since the iPhone 14 Pro and iPhone 14 Pro Max introduced the always-on screen mode, some time after the launch, users began to complain about burnt-in screens. We published confirmation of this in January and February of this year . Smartphone screens do show afterimages. In this regard, some believe that it is better not to use this feature.
Well, Apple does not consider this a problem, as indicated in the answer to the owner of this iPhone 14 Pro Max.