Bought iPhone 17 and Regretting it.

I have recently bought an iPhone 17 base version. LL/A (A3258) version. eSIM only. Phone looks authentic, speakers, cameras, display even iOS 26.4.2 shows up. It came with iOS 26.3. Manufactured in February 2026, first use in April 2026. My problem is that Apple Care expiration details won't showing up anywhere, settings, support app. It just shows you're phone is covered for : 1. Hardware service, 2. Phone support. But when I enter the serial number on apple website it shows purchased on 17th March. Even though I bought it on 25th April. I bought this device from Sri lankan seller. I used battery report shortcut and looks like phone never been used before. But I'm genuinely worried because if this is a stolen device or something like that, because I saw a post saying that these types of phone are bought with some 2 year plan. I don't wanna locked out if the seller isn't paying it. Please help me this is my first apple device, if you know what's happening. Your help is very much appreciated!