Issue with warranty coverege

Check your serial number here as well: Check Your Service and Support Coverage - Apple Support

Did you purchase AppleCare, or was it a warranty with a cell phone provider? If it's not AppleCare, it wouldn't be listed in your phone. You would have to check the paperwork with the warranty you got from the third party.

Perhaps the warranty that you see is for your old phone. Your current receipt from 2 months ago should clear up any confusion.

Assuming you purchased a new iPhone in a factory sealed box from an Apple Store or Authorized Apple Retailer, check Settings > General > About > Limited Warranty.

Where did you buy the phone? It sounds like the initial sale was over a year ago, which means you bought a used phone.

What pertinent facts are omitted? Have you, for example, changed country or region? Is this a replacement iPhone?