Apple airpods model number

Hello

Yesterday I have purchased an Airdpods 2nd Generation, i have checked the serial number on apple website and it is ok.

the serial number on the case and in the setting and also on the headphones are same and there is no problem about serial number.

But Model number (on the box is written A2032, A2031, A1938)

in the setting it is written A 2031

but on the headphone it is written A 2083

I have read more websites and also apple website that A2083 is model number of Airpod Pro.

but mine is Airpod 2nd Gen.

is it ok? is it normal? or maybe my headphones are fake?