The Find Devices is used to find all of the device and channel items, it is not designed to find the COM ports on the cFP-2020 module. The COM ports are COM1, COM2, COM3 (RS-232), and COM 4 (RS-485).
To configure the ports, use the VISA Configure Serial Port VI.
Regards,
Aaron
LabVIEW Champion, CLA, CPI