Does anyone know if it is possible to route the Babyface Pro FS inputs into Apple's MainStage and then into zoom?

The inputs are one mic via XLR and a guitar processor via the two instrument inputs.

I have tried the following setup: (1) adding gain to each input while leaving the main fader down; (2) processing the inputs via MainStage; (3) bringing the processed sound into Total Mix via the software 1 and 2 inputs; and (3) routing those software inputs to the Analog 1 and 2 outputs in Total Mix.  This works for getting sound into MainStage and out of Total Mix via headphones or monitors, but not through Zoom.

Also, in the setup described above, I am able to play music through the Music app and it is routed to Zoom, so the software inputs appear to be working and properly routed.  However, the MainStage output is not routed to Zoom.

Any advice concerning whether this is possible and what I might be missing would be greatly appreciated.

Thanks!