I'm going to catch some flack for this, but "non-binary" makes sense in the Star Wars universe as there are an insane number of alien life forms that exist in SW.

There are interesting things you can do with the idea, but they cannot come from the left. For example, a culture that uses gender-neutral pronouns out of modesty, where it would be considered crass to talk about a third party while identifying them by their genitals.