- Edited
Given that Apple has removed the Touch Bar from their laptops (it only remains available on the previous-generation 13" MacBook Pro that's still hanging around) I think it's safe to conclude it is a dead-end feature so given Orion's limited development resources I don't think investing any further time into Touch Bar functionality is worthwhile.
ImBIOS and anyone else looking to improve the Orion Touch Bar experience I would suggest you investigate BetterTouchTool which offers extensive system-wide and per-app Touch Bar customisation, where you could e.g. create a custom Touch Bar button to run the AppleScript set volume input volume 0
which should mute your microphone in reference to the request at https://orionfeedback.org/d/5597-mute-microphone, or open the macOS inbuilt Script Editor app, select Window → Library, add Orion to the Library list and double click it to view the various AppleScript commands & variables available to allow building Orion-specific scripts & advanced functionality.