Does The Apple Store Work On Any Version of ios? (Real vs Fake iphone question)

[saprano]

I got a manufacturer refurbished SE. Everything seems normal and official. The store though....The ios version was on 10.2.and the store didn't seem like the usual app store. It was a very basic version of it with no animation tiles. Just 3 rows of different categories.

I updated to ios 13 and the store changed to the traditional one with all the animated graphics and advertisements.

Is this normal? Did 10.2 not support the full app store or something? Or is the phone fake?