I've just added push-to-talk functionality to Teams using BetterTouchTool (which becomes more awesome the more I use it).
It includes numlock-down (unmute) and numlock-up (mute). Unfortunately it does not show this trigger (down/up) in the label, so both triggers look the same.
The feature request is to add: "[up]" and "[down]" or something similar in the label (on the left in the image).
