Yes, as far as I know, non-binary means that a person does not identify with either men or women. In any way. And they feel it isolates them.
In practice, I’m not sure how that would work.
Eating, sleeping, running, watching TV, bathing, drinking. None of these are gendered pursuits.
Even if you take extreme stereotypical masculine or feminine behaviour, none of them are confined to men or women.
Using power tools, baking, sewing, smoking cigars, playing rugby. All of these are just pursuits. Anyone can do them.
Most people are a mixture. Or take zero notice if something is considered masculine or feminine.
So the ‘feeling’ that you don’t fit it a specific stereotype, is fairly normal.
But giving it an ‘identity label’? That’s different. Now it’s special. Everyone has to know about it, you need to talk about it and people need to respond to you in a way that makes you feel validated.