Issues checking my iPhone's warranty coverage
Hi,
I recently bought iphone 14pro from the private seller, phone was sealed and looked brand new, I checked imei and serial all looks legit, even when I check through settings>about>it says limited warranty one year from now (-1 day), also when i login into mysupport.apple.com i see green check marks next to valid purchase date, tel tech support and repairs and service coverage, however if I try to check serial using https://checkcoverage.apple.com/
it says: Please activate your device
We’re unable to display coverage details because your device hasn’t been registered.
what does this mean? Could you please suggest what I should do?
Thank you!
[Re-Titled by Moderator]
iPhone 14 Pro, iOS 16