Earbuds of AirPods Pro 2nd Gen can have different model numbers or not?

My airpods pro 2nd gen are assembled in Vietnam. There are different model numbers in the earbuds (A 3047 and A 3048). But everyone even the google says that number on the neck of each earbud should be the same. But I have checked everything which are alright except those model numbers. Even the find my option is working properly with my iphone. The model number of the case is A 2968. I have bought it from the studio 7 in Thailand who are the authorised reseller of Apple.

Now someone please tell me is it fake or genuine?

[Re-Titled by Moderator]