They already have, in fact. An afro exists, braids exist, fades are just a matter of different textures.
Honestly the could do better there is even a softwares called code my crown that let’s anyone learn how to make afro texturized haircuts
I can't even see the images OP posted as examples because Imgur doesn't work in the UK, lmao. As someone who falls squarely under the stereotypical Asian straight/wavy hair archetype but still wants to make a diverse and pretty cast of OCs, however, I fully agree on us needing more curly/textured/black hairstyles. It really wouldn't hurt!