Today’s “media literacy crisis” moment is people taking this to mean that Jax herself is genderfluid/bigender. This the AUTHOR’s lack of preference for referring to a fictional uncracked egg. (Probably also to reduce potential pronoun policing in the fandom) People took this and ran away with it.

they made gooseworx

I personally think either is fine but that's just me. It was meant to be kinda subtle and vague, but I'm really bad at making things subtle.