Replacement instructions for Airpods and cases are provided at the bottom of this support article "How to find your lost AirPods, AirPods Pro, or AirPods Max": --> https://support.apple.com/HT207581 Neither the warranty nor AppleCare+ helps with the cost of Airpods that are lost or stolen. The cost for damaged Airpods may be lessened by any 'AppleCare+ For Headphones' coverage you may have.
'AirPods Service and Repair' lists replacement fees. Click here --> https://support.apple.com/airpods/repair/service
1. If you can't find your AirPod or Charging Case, or if something is damaged, get the serial number. Click on this link to discover how to find the serial number. --> https://support.apple.com/HT209371
2. Contact Apple Support for a replacement. Click here --> https://getsupport.apple.com/?caller=kbase&PGF=PGF32003&category_id=SC0298
(You may have to go to the support article in my first link for the special Airpod replacement service link if that one doesn't work.)
3. Learn how to set up your replacement.
Set up your replacement AirPods or charging case - "When you get your replacement, follow these steps to use your AirPods again." --> https://support.apple.com/HT207827
To learn 'How to find your lost AirPods, AirPods Pro, or AirPods Max,' click here --> https://support.apple.com/HT207581
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 link 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.
Airpods won't show in Find My if they were not set up in Find My first.
The support article also tells you how you can order a replacement.