@Xionide No problem, that’s understandable as it’s not common in writing for much with the exception being Choice script and maybe some play writing! And if you are thinking of adding non-binary, I would suggest some of the topic forums on the subject or simply ask.
Here are some I found in the forums.
A
B
And then I found some other interesting things that might help through various sites. Here are some photos.
I hope they prove to be helpful.