It works on Ubuntu and Debian. most likely they are referring to some GUI apps or their updated engine.
See: IMX415 + NPU demo on ROCK 5B
The issue here looks like the 3A engine crashed on reboot. If i am not mistaken they reverted some of the new changes made (that was causing a crash?).
Unfortunately, the engine couldn’t be natively compiled, so I couldn’t do much with it, as I don’t cross-compile.