my airpods are saying coverage expired

If coverage has ended then it has ended. If you bought these from a third party retailer that was not an Apple authorized dealer, the warranty started when that dealer bought them from Apple, not when you bought them from the dealer. See if the dealer had its own warranty.

If you think there should still be coverage click on this link to read how to 'Update your proof of purchase' --> https://support.apple.com/HT202703