Non binary is the kids tantrum of all gender identities. I'm not she! or he! Stop offending me! Jumps up and down! Let me access everything! Or nothing, because it's not tailored to meee!
Srsly, 'recognising' NB as a real thing is like enshrining law for punks or goths. NB as a status is no more real than the tooth fairy. According to the definition, most people are non-binary because most people don't neatly fit gender stereotypes.
The NBs are uncomfortable with themselves, like most young people and many adults and I don't see why the state should indulge this. If you called yourself a non-binary man, or non-binary woman, go ahead, that makes more sense and it's a more reality based way of stating your personality which is essentially all NB means, I e. I'm male but not your typical male.