Another vote for Di2 and Zwift functionality

Continuing the discussion from [Di2 ANT+ buttons as Zwift

Yes, similar request from me. Id love to use the di2 buttons i have on my bike that can control functions on my Garmin headunit when I’m out on a real ride. When riding Zwift, Garmin is not running so the butrons should be able to control functions on Zwift. Extra points if i can detemine which functions the buttons control.