Here is what Apple’s US warranty says,
”WHAT IS COVERED BY THIS WARRANTY?
Apple Inc. of One Apple Park Way, Cupertino, California, U.S.A. 95014 (“Apple”) warrants the Apple-branded iPhone, iPad, iPod, Apple TV, HomePod, or Apple Vision Pro hardware product and the Apple-branded accessories contained in the original packaging (“Apple Product”) against defects in materials and workmanship when used normally in accordance with Apple's published guidelines for a period of ONE (1) YEAR from the date of original retail purchase by the end-user purchaser ("Warranty Period"). Apple’s published guidelines include but are not limited to information contained in technical specifications, user manuals and service communications.”
The key take away is the warranty is one year from date of original retail purchase.
Now, here’s the limitation that is affecting you. Apple does expressly reserve the right to request “proof of purchase details” before providing service. It also includes restrictions concerning stolen products, security locks, and establishing that you are an authorized user.
Legal - iOS Warranty Document Us - Apple
So, you’re not specifically excluded. The US warranty does not specifically state the receipt must be from Apple, Apple Retail Store or even Apple Authorized Reseller.
What country are you in?