Xiaomi sees its 14T Pro as a high-end smartphone for less than 800 Euros (~$867). In our test, the Xiaomi smartphone, which is equipped with Leica cameras, shows an extremely high brightness with its 144-Hz AMOLED display panel. The rest of the equipment of the flagship killer hardly leaves any wishes unfulfilled either.https://www.notebookcheck.net/Xiaomi-14T-Pro-smartphone-review-Price-breaker-with-amazing-brightness.907877.0.html
"This is probably due to BFI for burn-in protection."
BFI is to reduce motion blur as far as I read from rtings.com site.
In overall, see no reason to buy a 1K USD phone. See no reason in 12GB RAM on phone. At this price and specs, it should replace a PC via possibility to plug it into a monitor, where the phone switches to a desktop mode.