yes

I expect them to dig up people with curved pinkies due to holding phones all day

divers? was that supposed to say “divots?” Are there actually documented cases of someones skull deforming from wearing headphones enough? I have never heard of such a thing.

Divers wearing headphones? Regardless, I suspect that after a million years there won’t be much left of the headphones.

I think headphones aren’t tight enough to leave divots, but cochlear implants might make them wonder.

Of archeologists don’t know it: “for religious reasons”.

1. If the civilization that discovers it is more advanced than 20th century humanity, then no. They would know their purpose.
2. If it’s not as technologically advanced, the it’s possible I suppose