When they are going to deign to manufacture a controller for the focus, the joystick, and the REC button.
What is the use of having the official double grip if you cannot use the focus wheel at the same time or you cannot activate or for the REC.
They should at least factory a cable so they can put the focus elsewhere.

I mean a bluetooth or wireless controller.

You might want to post this in the appropriate section for a response.  We like to discuss the Spark drone here.  Which has a very capable controller and a fixed focus lens.