If you’re using Windows, within XCTU, when you select the Discover Radio Devices icon, does a COM port show up?
If not, you may need to install the drivers for the FTDI transceiver chip, here are instructions on how to do this. FTDI Drivers for Windows/MAC/Linux for USB transceiver Chips - Semiconductor / Integrated Circuits (ICs) - Electronic Component and Engineering Solution Forum - TechForum │ DigiKey