No, you did the right thing. I totally forgot that Mac Studio has USB-A ports on the back. Forget I mentioned USB-C.
Anyhow, the point is I’ve noticed problems with brightness control when using some USB hubs (on my Intel systems), which didn’t occur when the ACD30’s USB was plugged directly into the Mac.
Not sure why it’s not working then?
I might try restarting and see if it makes a difference