OBS and Zoom in conjunction with IRIUN and an Iphone

I use Zoom and OBS for Video Conferences.  I also use IRIUN to use my Iphone as a webcam.  This combination works fine for Teams (OBS, IRIUN, and IPHONE) using the Virtual Camera of OBS.  The OS platform I am using is UBUNTU 21.10.  When I try to use this combination with Zoom the Virtual Camera dosen't show up in the camera selection section, the iriun camera does, but when selected it only shows a grey screen.  If I use Zoom with iriun and my Iphone it works fine, it also works fine if I just OBS and a USB web cam.  Zoom finds the Virtual Camera just fine.

Thanks for any suggestions.