I always forget the name of their species, but the people who require a breather to pump in fresh non-Oxygen rich, I assume that if they had any ships, their life support would be exclusively their air, with those neck devices to help pump when visiting other plants and ships.

The Barzan! This is actually something in Discovery! They go to a small Star Fleet ship that was run by an all Barzan crew (just one family), and the atmosphere is modified for them, so the Barzan member of Discovery’s crew doesn’t need her breathing apparatus. I think you’re probably absolutely right that other Star Fleet ships are made with serious accomodations for other species. Maybe the Bolian ship has especially robust plumbing lol