You can use your ebike without the motor power by either turning off your ebike or switching your Pedal Assist Level (PAS Level) to Level 0 in order to ride it just like a regular bike.
Using your ebike without the motor power may require more effort because of the extra weight of the ebike components 💪! It may also feel more difficult to pedal your bike with the motor turned off or in PAS 0 as there will be some resistance since when pedaling you will also be exerting some force in order to turn the motor rotor over inside of the motor stator. Though it is possible to continue to ride your ebike without power from the motor, it will be more difficult to pedal. The good news is you can always use the motor again to get the power boost you are looking for.