Main LR Bus on/off per channel

I’d like the ability to switch input channels on/off the main bus.
This allows me to turn off ambient mics from the main bus, but keep them in a broadcast/stream post-fader mix of the show.

I didn’t see this request - although it may have been made before.

This is sort of linked to my other requeest for pro/post fader selection per channel (and not globally per bus)