You can like wearing sundresses and lace and still be nonbinary.
You can like wearing pantsuits with ties and still be a woman.
You can like wearing floral patterns and still be a man.
Gender identity is valid. Gender expression is subjective. Gender norms are bullshit.
I’m white, so I’m not the best person to explain why it’s racism and appropriation. Here’s a really good post written by someone who’s black that explains why you shouldn’t use AAVE (African American Vernacular English) unless you’re black.