SOLVED! I was experimenting with trying to see if I could see the NDI feed inside of OBS. That lead me to installing the NDI plugin for OBS which had a dependency: ndi-runtime-4.5.1-macOS.pkg. After I installed that I got video & audio from the NDI video monitor on my Mac. w00t!!!
Office Flame on the left via RGS. Watching the feed on my Mac on the right through the company VPN.