The Radxa Orion O6 is a really nice ARMv9.2 ITX board, and supports UEFI boot. Installation of Debian trixie using Debian's vanilla installation media went flawlessly, and it's been running fine for 6 months now.
I can't really say as I don't use them. This is a host mostly working as a CI worker connected via ethernet.
I just scanned for WiFi networks and that worked fine. I also see that GPIO is not enabled for CIXP1 devices in Debian's kernel; I'll ask the kernel team to enable it.