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Uncle_Sheogorath
No. Non-binary means the person does not fit in the spectrum of female and male (masculine and feminine) identities. (It refers back to third gender or two-spirit (Indigenous term) during the old times). They are not inside the gender norms.
I’m terrible at explaining. But some non-binary people use they/them pronouns because being called she/her or he/him in not comfortable for some since they do not identify as either or they identify with both masculine and feminine identities.
Think in the way of androgyny.
It is also an umbrella term for agender (having no specific gender. Think of venom (he is an alien with no definite gender, his gender is who ever has him, and he can get pregnant; it is in the comics. I use he/him pronouns for him cause of who has him) from Marvel), gender fluid (moving between male and female; think of Loki from Marvel because he can shape-shift into a female), bigender (identify with both male and female identities), etc.