USB MIDI Driver not seen by Cubase or Audio MIDI Setup on MacOS Monterey

Used the Yamaha USB MIDI driver for years to control Cubase from my Yamaha O2R96 digital mixer but after reinstalling to macOS Montereyin Intel MacPro and reinstalling the driver I can’t seem to get Cubase or Audio MIDI Setup to ‘see’ the mixer. USB hardware is visible in System Report-Hardware-USB. Yamaha website has recently updated drivers which I’ve tried (Yamaha 1.5 and Yamaha-Steinberg 3.1.4), tried swapping usb cable and ports and continually rescanning for MIDI devices to no avail. Anyone else experienced this?