They have made an autoshifting drivetrain based on their
Nexus 8-speed IGH.
These are designed for folks that can ballance, steer, pedal and brake but can't shift.
tcs
Since there is only one gear-changing location (the rear hub) that was a simpler system to automate and Nexus appeals to the casual, non-performance minded rider so it's weight and inability to "know" what you want isn't as important.
Doing the same thing for a two-derailleur drive train would be more complex but, I'm sure could be done, if Shimano thought performance riders wanted it and the weight penalty was minimal.