Are AirPods Max 1 gen original or no?!

Hi all!

I bought AirPods Max 1 gen used , they are blue and everything looks and sounds they are original. But the question is only in find my - it shows that they are with me but it doesn’t show the point and write that mismatch AirPods ( how it can be with max ) ? And that set up didn’t finished . But they connected and playing.

on the Apple website it doesn’t find the serial number..

cups are taking off , sounds great, doesn’t look like a fake, but it’s very strange .

aah and on the top part of left ear there wrote axis*100.

can you help me to understand the situation please)