When Mx Master 3 is connected to mac using Monterey 12.3 - universal control onto ipad pro doesn't allow use of certain function keys (like cmd), and the scroll function. Disconnecting MX Master 3 mouse allows these functions again.

Not sure if this is an Apple issue or your issue, but it's in your interest to resolve, because I'm looking to move back to the inferior apple magic mouse just so I can use universal control effectively.