it isnt asking if the engines power the wheels.
I know that they dont.
Your saying that a plane is on a set of rollers that dont move in the opposite direction...

"This conveyor has a control system that tracks the plane's
speed and tunes the speed of the conveyor to be exactly the same (but
in the opposite direction)."

If you are saying that the wheels are moving twice as fast, then the conveyer is not matching the planes speed. the plane is going faster.

Doesnt matter what pushes the plane, if it can not get the air resistnace ( due to the Conveyer belt moving AT THE SAME speed in the opposite direction) under the wings It will not take off.