I swear my tinnitus is a result of use of AirPods.

This comes up every now and then, similarly people say it is caused by noise cancellation. I have looked into this once out of interest, but there doesn't seem to be much scientific evidence for this. Unless you put them at a far too loud volume of course (or presumably block your ear canal all the time and it causes infections).

A high percentage of the western population switched to noise cancelling headphones and earbuds the last ten years or so. There is also a base rate of developing tinnitus in the population. So, it is more likely to just be a coincidence.