Shifting the throttle to the left handle bar

Wow, that's an unusual request.
Sorry to hear about your injuries.🙏

I guess it would be possible to flip the control/handgrip assemblies right to left, but obviously the associated controls would be upside down, and at a less than optimum angle.

The throttle grip would also rotate backwards from normal. I suspect you could get used to that, or is may be possible to reverse the return spring, and possibly reverse the throttle response in custom tuning software.
It might be worth a call to DynoJet.

Good luck, and hopefully it's possible. These things really are a lot of fun to ride.