∞ Apple Support: How to find your lost AirPods:
The first bit of this video is pretty straight-forward. Launch Find My, then tap Find.
But watch the video all the way through. There are subtleties (like the left and right buttons in the upper left) and details on activating Lost Mode.
Not rocket science, but better to be familiar with the process now, less stress when you can’t find your AirPods and that frantic search begins.
Source: The Loop