Hi @dream
I’ve raised this quite some time ago: Instrument Track: Keyboard Shortcuts for the *Audio* Inserts/Sends?
Here’s Matthias’ answer: Instrument Track: Keyboard Shortcuts for the *Audio* Inserts/Sends? - #5 by Matthias_Quellmann
Seems that this has not yet been further addressed, but I hope someday it will 
All the best