If you want to reuse the same voice-over multiple times in your video, you can easily duplicate it directly from the timeline.
To do this, once the voice-over has been added to your project:
In the timeline, select the voice-over you want to duplicate, then click on Duplicate.
Note: The duplicated voice-over appears next to the original. You can then move it wherever you want in your timeline.
You can duplicate a voice-over as many times as needed in your project.