OnePlus 6 and OnePlus 6T are backed by OxygenOS, which is considered to be the most snappy and feature-rich Android skin, but there’s a possibility that you are someone who likes to dabble with different custom ROMs and skins, and Xiaomi’s MIUI 10 has caught your fancy.
The developer, in the forum post, has revealed that almost everything seems to be working just fine including the notch support and automatic brightness. However, the MIUI 10 port does have a lot of things that don’t work such as NFC, Flashlight toggle in quick settings (third-party apps work), Xiaomi’s stock camera app, alert slider, among other things. The developer is currently working on bug fixes, so all these features can become available very soon.