Umang Raj

tried to make this, and if you don't unplug the promoted transforms from the transform objects, you can use the values in other nodes too! so you don't have to do this later.
I hope this is what you want to achieve

if you want it as seperate control, then, im not sure if it is possible, it would most likely create cycles in your rig.

Guessing that there is no solution, I've submitted a rfe for this.