I don’t see that mentioning anything about covering the headphone jack before the test. As I understand it, being ip65/68 means it’s both, where 65 is “low power spray” and 68 is “immersion”, not that it’s 68 only if some unspecified conditions are applied

Asus zenphone 10, for example. IP68, headphone jack

I’m sure there are and have been others

The removal of headphone jacks or sdcards have nothing to do with ip68 rating. It’s to sell adapters and to make you pay a lot for extra storage

Reminded me of this… People will support a lot of bad things if the alternative is a minor inconvenience