No problem to me, happy to call people what they want.Then what is the problem with someone identifying as how they wish? If someone identifies as a cat, a piece of lego or another gender than what they are biologically how does it effect you or anyone else for that matter?
The problem is for the person and their grip on reality.
If you identify as a Cat, I think you have some serious issues to deal with.
As for being non binary, it’s nonsense terms.
I really think people are getting themselves into knots mentally and just act or look whatever you feel without putting a label on it.