Thanks for the reply Ron.

Do you know what settings (baud rate etc) that you use to get it connected?

I've tried connecting the mount directly to the USB2.0 ports on the Pi4 (running Stellarmate) and it doesn't seem to work either as well as having no luck having the mount connected to the PegasusAstro PocketPower hub. It has two USB2.0 ports but does connect to the Pi4 over one of its USB3.0 ports.