Can I buy a single AirPod if I lose one?
Can you purchase just the right iPod , and what’s the cost
[Re-Titled by Moderator]
Yes, you can get only one AirPod replaced by Apple, have a look at this AirPod Service Page for more details, or click on the "Replace your AirPods" online link:
AirPod Service & Support - Apple
Replace your AirPods or Charging case - Apple Support
The AirPod Service page will also give you an estimate, if you fill in your exact AirPod model name