AirPods 2020 replacement
How to use this 2020 purchased AirPods and get a replacement?
AirPods Pro (2nd generation)
As mentioned in the linked article, your AirPods have to be checked first by either an Authorized Apple Service Provider, an Apple Retail Store or by the official Apple Support.
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Choose one of the service options below to have your AirPods Pro serviced. Your AirPods Pro will be examined prior to any service to verify that they are eligible for this program. AirPods Pro (left, right or both) with a confirmed issue will be replaced. The AirPods Pro case is not affected and will not be replaced.
- Find an Apple Authorized Service Provider.
- Make an appointment at an Apple Retail Store.
- Contact Apple Support.
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copied from: AirPods Pro Service Program for Sound Issues - Apple Support
If your AirPods Pro are not par of the Service Program for Sound Issues, you will have to pay for getting them replaced: