One of the Bajorans serving on Voyager wore an earring. Gerron, the young former Maquis that was part of Tuvok's boot camp in "Learning Curve" had to give up his.

There's also Tabor from "Nothing Human", and Tal Celes from "The Good Shepard", neither of whom wore the earring on screen in the four total episodes they appeared in. Tal also had her given name before her family name, which is not the Bajoran tradition.

Even Seska didn't wear the earring when she was still undercover as a Bajoran, and likely could have gotten away with it thanks to her closeness to Chakotay.