I believe it is, but you may need to use an additional product to get there... there is a little puck called BOND, that controls ceiling fans that use remote controls... other than that. I would think wiring in something akin to an outlet (in ceiling) to allow the use of the voice controls for a non remote fan. the electronics are there, and simply put, wiring a male connector onto the fan and a female onto the wiring in the box, then cramming all of it into an electrical box (You can buy oversized/deep boxes). Or be very adventurous and buy one of the many available modules to control pretty nearly anything... keep in mind the "last known setting" portion of anything other than products made with that feature will not work.
I have one remote controlled fan I would like to do the same with, however, I can't make that happen without gutting the fan controls as the dimmer in the fan kills my ability to use even the most standard of LED bulbs... making it worth less to even bother.
On most Non remote controlled fans, they have multi-pull operation making the "last known setting" feature impossible to miss... always coming back on after a power outage or cut off, at the same operating speed it was in prior to that event.