If it is MacOS connected directly to the IC7300 via USB then there is no need for wfview to have any involvement with the audio, you can simply select the IC7300 USB audio input/output as your default audio devices within zoom.
If you are using the wfview server and a remote client then you will need to use a virtual audio cable like VB-Audio Virtual Apps you then select the virtual cable/sound card as the audio input in wfview and select the same device as the output in zoom.