Can't get reference toFullscreen "Zoom Meeting" window (trying to toggle "Original Sound" setting)

Using GUI scripting to tell application process “zoom.us” …

I am able to inspect the title of every window in order to obtain a reference to the “Zoom Meeting” window.

Then I am able find zoom’s “Original Sound” button in theZoomMeetingWindow so I can toggle it on/off…

But when the zoom meeting window is displayed as Fullsceen, zoom’s window list does not include the “Zoom Meeting” window.

The Xcode Developer Tool, “Accessibility Inspector”, does see the “Zoom Meeting” window and it does list its various properties. But I can’t figure out how to get a reference to this full sceen window in Script Debugger.