Mac Studio Display camera is turned on and selected, but Zoom only shows a blank screen.

I have a Mac Studio Display Monitor that includes a built-in Camera. When I switch Zoom to this camera my video is blank / black despite the camera light being on. I do not have this problem in other video conferencing applications like Teams. The problem has persisted for months despite:

• Uninstalling and reinstalling / updating Zoom
• Updating the Mac
• Resetting Studio Display Monitor