If you install Ubuntu Touch on it, everything works because its using the vendor's android kernel for hardware drivers. PostmarketOS is using the standard Linux kernel and a LOT of volunteer hours have been spent by people reverse engineering the hardware without manufacturers help, to get working drivers added to the Linux kernel. That's why not 100% of the hardware works yet on most phones postmarketOS supports.

My gripe with ubuntu Touch is I like the app ecosystem and desktop interface (gnome mobile) better with postmarketOS, so I'd rather run that instead.