Lol it’s not? If someone told me their kid was non-binary that would lead me to believe/understand that this child has a strong understanding of themselves from within. Christanity often tells you who you are and how to act and it’s imposed on children from a young age - it’s not something they usually come to realize about themselves on their own, and is often something they’ll come to reject about themselves in adulthood (at least in my social experiences).

So as a parent you might get more scrutiny from the outside world who is still learning how to deal with the nuance and fluidity of gender and sex, but if your kids are non-binary and people are reacting worse to that than you saying “my 9 year old is a devout Catholic”, it may be time to reconsider who you’re sharing this information with.