My daughter wears mostly athletic clothes. She loved Lululemon but only has a couple of things. Your daughter will blend in if you get her short black or white shorts, solid color tops and black leggings. They wear a lot of crop tops but a solid color tee without a logo would be fine. DD and her friends all bought these shorts in black and white.
https://www.amazon.com/gp/aw/d/B0CBFCNSZJ?psc=1&ref=ppx_pop_mob_b_asin_title&th=1
As for jeans, a lot of girls wear regular and jean shorts. My daughter doesn’t like how they feel so never does.
I do see them wear dresses sometimes but like they are tiny tight dresses, not summer flowy dresses.
For shoes, pastel crocs. Light blue is popular. One of my kids have chunky white sneakers and the other has a regular pair of Nikes.