I have said it before I will say it again. Lenz's law in which
alternating magnetic fields produce a force is a "action reaction
pair". If you take 2 coils facing each other with an alternating
current, each will experience a force. Although it is different for
superconducting coils, there will always be some degree of force on
the track.
In this case, the rails are mounted firmly onto the ground and thus
the force is mostly on the train.