Unfortunately, I was unable to get my MOTU 828 mkII to be recognized by my new M1 MacBook Pro in any way, using the aforementioned dongle chain. Drivers install, but nothing happens beyond that. I believe the “unofficial” support that legacy MOTU firewire devices have enjoyed stops with the M1 machines, though who knows what will happen when they do update drivers for the newer devices. I recently picked up an ultralite AVB in the hopes that it would work as a class compliant USB device - it is recognized, but so far I’m only getting glitchy, unusable low bit rate audio.
On the other hand, my old apogee duet has worked fine as a class compliant USB device. The apogee maestro software doesn’t recognize it, so only adjustments available on the device itself can be done (ie, can’t enable phantom power or change from preamp to line inputs). let me know if I can answer anything else.