Does the zwift run pod pair with a garmin 920xt to be used like a standard footpod?
Or is it exclusively for zwift run only?
The Zwift Run pod broadcast is Bluetooth only and the 920xt only receives signals in ANT+, so no it will not connect.
You could connect it to a phone app to use on outside runs.
I thought as much, hopefully zwift run android will go ant+ but if there’s no sign of that happening then I’ll just own two footpods for two different reasons 
I think it’s kind of funny that the 920xt has bluetooth to phone connection but not to sensors. haha