How to connect directly to Rak5860

Is it possible to connect to the USB port on the RAK5860 to issue AT commands directly to the BG77 module?

In device manager, I am only seeing:
DM Port
NMEA Port

When I connect to these and issue an AT command, I don’t get a response. Any thoughts on how to access the modem directly so I can use tools such as QNavigator or Qcom?