Similar issue here with z690 Maximus Hero Eva. Also, i can no longer change my graphics card's (3090 Eva oc 24g) lighting any other way than thru Aura sync. On top of that, my Motherboards special features can't be accessed (rgb header/AI Microphone/speakers/RGB Calibrations) Seems like this one update broke it hard. Thought maybe it'd help to know you aren't alone friend.
Just install the update
and all still there
Armory crate update was already bugged that I could not access my motherboard (Infinite loading). So I just did this motherboard identifier update and now I can't see my motherboard on the device list anymore, even after a restart. My motherboard is an Crosshair VIII X570 Dark Hero.
So there is definitely something not working here for some motherboard/platform
Update, I have a second system with a different ROG motherboard. Updated it and the same exact thing happened. And like my primary system, the motherboard will reappear for a time if you wait long enough, but it will vanish again in time as well.
in my case, deleting the content of directory "%LOCALAPPDATA%\Asus\Armoury Crate Service", then restarting "Asus AURA SYNC lighting service" (or rebooting) fixed all the issues (mother board not dected and non fan control).