Just FYI, you can tell, instantly, if the motor stops. Usually you can hear the prop noise go away and it becomes pretty clear when the motor stops pulling. You really don't need to "hear the motor" even if you are a long way out.

Since you mentioned dead stick, one nice thing with electric is you can stop and restart in the air so you can more easily practice flyingin a glideandpracticetrue dead stick landings without the risk that would come from actually killing the motor in the air and not being able to restart.If you mess up the practice dead stickapproach you don't have to ditch in the weeds/woods/water, you can restart the motor and go around. Much safer!

You can actually do repeated dead stick touch and goes, which canbe fun! Someelectric pilots land dead stick as a matter of routine. I do.

When I teach new pilots, one of the early lessons is to learn to glide their airplane. Learn not to depend on the motor to fly the plane. Learn to fly on the wing, not on the prop. Lean how to control and recover from a stall with no help from the motor.

Climb and glide. Get it high and power off - completely! Now see how long you can keep it in the air. Get to know your plane's glide character, its glide path and its glide speedso, if you do lose the motor, it is not a panic situation,just a routine matter. Some planes can even be thermaled.

When practicing landings they can land dead stick, power on to land, or they can touch and go.

This is also why you see lots of electric launched gliders but you don't see many glow launched gliders anymore. You climb, you soar, and if you want, you can reclimb without landing to refuel or restart. Makes soaring so easy and so much fun. And the quiet motorseems to be more in keeping with the whole soaring experience.

Each power system has its advantages. Knowing when the motor stops is not one of them.