Did you create an issue ticket?Is this one somewhere to be found on the internet yet?
https://developer.sony.com/develop/open-devices/downloads/software-binaries still offers OEM from february 12_4.19_v1c.
Compiling branch android-12.1.0_r7 still give me the same problem mentioned above - no display.
I'm hoping new OEM drivers will make a difference - I doubt this as scrcpy does not function as well which makes me think it's not driver related. But it's worth a try.
And it's not released yet.