After having car serviced to pass inspection, the car cut off while driving. Would not restart. Had towed back to the service center. Car battery and key battery replaced 2022.

 

Could be about a million things. The best is that something just failed (could be a million things, again). The worst is that your timing belt broke - if that's the case, you probably heard some unpleasant noises from the engine, and if you try to start it, it'll sound "different" when it's spinning over.

Is there a check engine light on?