Zwift on iMac not seeing Garmin Sensors 2

Hi there

my setup is iMac (catalina) running zwift, garmin sensors 2 (speed and cadence both bluetooth and ant+) dumb trainer (minoura vfs150).

I cannot get the sensors to show up in zwift. I know they are functioning properly as I have had them coupled with my garmin 520 plus. I have disconnected them from the 520 plus before trying this. the lights on the sensors flash green but nothing shows up on Zwift.

Any thoughts appreciated!