Why do I get the message that my AirPod Pro are not eligible for AppleCare?

https://www.apple.com/support/products/headphones/

How to buy

1. Purchase AppleCare+ with your new headphones.
2. Or buy it within 60 days of your headphones purchase:

• • At an Apple Store (inspection of headphones and proof of purchase are required)
  • By calling 800-275-2273 (requires you to run a remote diagnostic and provide proof of purchase)

When did you buy them and did you buy them from Apple or an Apple Authorized Reseller?

Thank you!! This was very helpful.

Thank you! Your expedient response it most appreciated. Very helpful.