It was the same for me. iPhone SE.
They work on the iPad (iPad from 2022).
Try another device?

I solved it somehow.
Both except box and put together and printed a lot of times on touch area more times at the same time, then in case the same afterwards loaded the box and let it load a few hours. No idea but now are usable

Two sets of earbuds worked out of the box for me without any problem, even without need for additional charging.