Canon Webcam Utility not recognized

Has anyone managed to get RingCentral Meetings to recognize Canon's Webcam Utility?
The utility allows us to use our really nice Canon cams as webcams, and it's amazing.

Works with all our other streaming/meeting services, including Zoom, Teams, Google.

But RingCentral, which is our main meeting tool, has so far never recognized the Canon utility or camera, despite different attempts at troubleshooting, and searching the knowledge base.

Thank you

Canon Camera: EOS R firmware 1.4

OS: Mac Big Sur 11.2.3

RingCentral Mac App

Version: 21.1.30.436 Web, 21.1.20.3053 Mac

Date: 2021-03-16 19:45:14