You should apply this patches with Magisk:
i tried it today - it works!
For YouTube, you need Red subscription or a mod version of the YouTube app for PiP to be functional.
the rom is updated with the series of 8.1.0 but the battery drain is the major issue the total battery life after installation of the rom is 5hr 26 mins
the rom doesnt provides with options to modify the UI and also lags on gaming . Camera is good but you can try ported MIUI camera app for better picture quality. There no pre installed music app in the rom one needs to install it from a third party directory or a ported music application. The rom doe's not support Dolby ATMOS installation.