Hi, I have two series posted on Tapas, both have at least one NB/Gender Diverse character.
There's Adventures Of The Disparate Crew, which is a series of short stories about a group of teenagers, one of the prominent characters, Kelly, identifies as genderqueer and uses "They" pronouns.
Also, my other series is called A Classical Guitar Dream, one of the main character's best friends is called Hayden, but goes as Halley sometimes. Hayden is genderfluid, and his/her gender changes throughout the series.