Regen braking puts some electrons back in the batteries, but the method alone is insufficient. You also have to account for the extra weight of the trailers for the motors and electrics. There's also a reason that electric vehicles concentrate so much effort on aerodynamics as moving air takes more effort/energy. The Atlis concept is about as aerodynamic as a backyard shed.

For the vehicle in the OP, The Ford F-150 3.0l Power Stroke Diesel has a range over 750 miles and officially gets 30 mpg (but I did see a video review where they got 33.6 mpg on a one tank road trip). Fill the tank in a few minutes and you have another 750.