You can make your audio track or song loop and repeat throughout your entire project!
Looping Audio in Projects With a Single Track:
Click on the Audio icon at the top of the Workspace. That will open the Audio Library on the left hand side of the screen and the music player, under the video preview, in the bottom right corner of your screen. Click on the audio track to open the settings menu. There you’ll find the loop icon to set your audio track to repeat.
Looping Audio in Projects With Multiple Tracks:
In projects with multiple audio tracks, turning on the loop tool will replay all of the tracks in the timeline in sequence. Click on the arrow icon to the top right of the audio timeline to toggle looping off and on. Multiple tracks are only available to users on the Professional or Professional Plus plans.
See also:
What Plan Unlocks Voiceover and Multiple Songs?