thanks man, you're awesome! 
Sidecar seems like a pretty good feature - you can even record the screen and it does not record the UI (emulated touchbar, shortcuts, virtual keyboard)...
Currently it's probably unintended but I love it - you can have BTT touchbar on MBP, and native app touchbar on the ipad. I can run app like ScreenBrush to draw on screen, use screenbrush controls from ipad and BTT from MBP.
I guess Sidecar is yet another area BTT could shine, surely if it's even doable If not you then who?