All movers will have a maximum weight limit as part of their specification,Possibly the answer is it depends. Most movers have a weight limit which you should not exceed but most lighter twin axles should manage with one axle but heavier ones will need two.
You should never fit a mover that is not compatible with the weight of caravan you have.
You should only fit a mover to a TA if it is specifically specified to be suitable.
Its as black and white as that .