I was able to quickly test some other RME gear that I have and wanted to share the results. The tests were done on 7.1, not -current. I only have dmesg output saved.
RME ADI-2 Pro FS R works. Tested audio playback, not recording. > uaudio0 at uhub3 port 2 configuration 1 interface 1 "RME ADI-2 Pro > (53791118)" rev 2.00/0.01 addr 5 > uaudio0: class v2, high-speed, async, channels: 8 play, 6 rec, 0 ctls > audio1 at uaudio0 > ugen1 at uhub3 port 2 configuration 1 "RME ADI-2 Pro (53791118)" rev > 2.00/0.01 addr 5 RME Fireface UFX+ does not work, does not attach. > uhub3: port 2, set config 0 at addr 5 failed > uhub3: device problem, disabling port 2 I'll try the Fireface UFX+ again more thoroughly in ~2 weeks and with -current.