A tractor prop mounted on a pusher motor will move the plane towards the tail, even if it's reversed on the motor.
The direction of rotation of the motor must be reversed to use a tractor prop as a pusher.
Some i.c. motors have the front plate seperate, and it's possible to rotate that so the motor will run "backwards".
Electric motors, just plug them in "backwards"*, and use a conventional tractor prop.
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* reverse any two of the three leads with a brushless motor to reverse its rotation.