iPhone activation

Dear Apple Team,

I bought iPhone 12 Pro on January 3rd, 2021 in Uzbekistan in Mediapark (“Authorised Seller”). I activated my the phone on January 3rd but ‘Limited Warranty’ date in ‘Settings’ shows December 19th, 2021. Does it mean that the phone was opened and activated 15 days earlier?

Mediapark says the date of Limited Warranty may vary to 10-15 days. Is that true? Or did I buy a used iPhone?

Thank you