I'm white with wavy hair and only use black hair products - because black women really know curly hair.
OK one product may be caught up in a Tiktok wave but honestly, it's not hard to find black-owned brands selling hair products, there are multiple internet shops selling them. Over the years I've had multiple 'holy grail' finds.
Seeing products like Cantu on the shelves in supermarkets to me is huge progress from the years when the only good thing to do to curly hair was straighten in, and if you were black as well then the shops simply didn't want your business.