linux – How to output to a virtual sink from Zoom

I’d like to send audio to Zoom from a virtual sink monitor in pulseaudio.

I can see all the sinks/sources in my environment available in Zoom, apart from the one added via module-null-sink. I added it using:

pactl load-module module-null-sink channels=2 format=float32le

which matches the configuration I see on an existing Jack sink. (and I can see the Jack sink/source in Zoom) If I try to force it from the pactl interface, I get:

Failure: Invalid argument