@MBB
I ordered one of these from Amazon to try out with hirsute.
Keeping my fingers crossed that I don't have to edit any files since that seems to have worked for you. I can always try focal too.
Flashed the hirsute image to a 8GB microSD card and the box booted right up though the 4K LG TV it is connected to flickers/tears. I got all the way through entering setup information and could see the XFCE screen which is still not stable
After doing some additional reading, I added the following to /boot/extlinux/extlinux.conf which fixed the flickering at initial boot
In XFCE, I managed to get into Applications -> Settings -> Display and changed the setting to 1080p which fixed that too.
The remaining thing is that the graphical splash screen where it asks for the password at login (or after logout from XFCE) is in a weird resolution.
Thanks