@JessMahler @snosrapkungfu @Rowyn @vicorva
Harmony of Falling Snow has an enby side character and a few enbies seen in passing. And all children are considered agender. The 3rd book in the series will have an enby love interest and ze's slated to be a lead in Book 4. But I wouldn't put Harmony on the list myself as the POV characters aren't enby.
Note: I'm enby, so feel like I should have more enby characters, but there we are... (Also, my more active account is @andy_the_frazzled )