Maybe add the option to be transgender as well as being non-binary?
Some time ago already I think this was discussed, so I traveled to the past to find the info. Short explanation: its not impossible, but it would take a lot of time. To illustrate this, I´ll copy paste the helpful example from Ben Dover, since I am unable to find a quote tool lol:
"An out-of-universe answer is that you'd need to change too much stuff. For example, while in some cases you have phrases like "Dulrig said:<<You are a good [if Male "boy"/ if Female "girl"], [if Male "lad"/ if Female "gal"]>>" that can be easily changed, sometimes you have scenes that change based if you are male or female, like "Then Logan started to [if Male "stroke your cock saying:<<You're a horny boy"/if Female "touch your clit saying:<<You're a horny girl>>"]"."
So yeah, code wise looks like a whole mumbo jumbo mess. And I cant imagine applying the same stuff to the rest of the game in its current stage. But, who knows.