Yes, there are plenty of phones that have IP68 & 3.5mm without any rubber flaps etc., not to start a flamewar but it's strange to me that a lot of people seem to think they would be a necessary tradeoff... Apple had other reasons to get rid of it.

https://www.gsmarena.com/sony_xperia_1_iii-10712.php https://www.gsmarena.com/samsung_galaxy_s10-9536.php