I lost my AirPods can’t find them on find my phone

To learn how to find your lost AirPods, read this support article --> Find your lost AirPods - Apple Support

Using the features offered by Find My is the only way Apple offers for tracking or locating a lost or missing device. There is no other Apple service that can find, track, or otherwise flag your device for you. If they do not work then you will have to resort to conventional methods for locating lost items. For Find My, ALL the requirements in this list must be fulfilled for Find My to even have a chance to work:

- Find My [device] must have been set up before they went missing.

- They must be in range (<~150') or all you will see is "last location".

- They must be charged (see the above article for details).

- They are not inside their Charging Case (Airpods Max Smart Case is not the same thing.).

- They have not been reset by somebody who found them.

- To find a single Airpod, put the one you have in the charging case first.

- You cannot track a lost case with Find My. With AirPods Pro (2nd generation) you can play a sound to help you locate them.

If Find My is not tracking them then you will have to resort to conventional means for finding lost objects.

Just to check.

• Did you pair these AirPods to your iPhone already BEFORE they were lost?
• Are they still in their charging case?
• Are they still charged?

If you answered "no" to any of these, their location will not be shown in the Find My app. If none of those are true, then, another iPhone must be near them to be able to pick up their Bluetooth signal to then send them to the Apple servers.

Ref: Find your lost AirPods - Apple Support