Lost/Stolen Airpods

Here is How to find your lost AirPods - Apple Support

AirPods and AirPods Pro communicate using Bluetooth and not Wi-Fi or cellular radio, so the communications range is very limited. AirPods and AirPods Pro report location using a paired iPhone or iPad, so they’ll only have limited location-reporting ability. And limited battery life, too. Put slightly differently, Find My with an iPad or iPhone is much more capable of reporting location than will be Find My with an AirPods or AirPods Pro.

Does it matter? If the AirPods don’t show, we all get to look around the old-fashioned way.

AirPods can be offline because they’re in the case, because the battery has discharged, out of range of a paired device, gone swimming with the fishes, trampled by pachyderms, fallen into a sinkhole leading into an old gypsum mine, or, yes, stolen.

Expectations around Find My and AirPods unfortunately don’t seem to match their location-finding capabilities all that well, but then the AirPods also do lack Wi-Fi, cellular and GPS capabilities, so their communications capabilities are comparatively weak.

Per Apple: If you see "No location found" under your AirPods, you can't play a sound to find them but you might be able to get directions to the location where they were last connected. If your AirPods do come back online, you'll get a notification on the iPhone, iPad, or iPod touch you use them with.