I don't know whether they're authentic African outfits or "what people of African ancestry who aren't living in Africa think is African", but I see women dressed like that in Detroit, at least during festivals.

A couple of years ago a local museum had an exhibit on "the hat tradition" in the African American community. I'd never considered before that the tradition of wearing flamboyant hats, and some of the hat styles, developed from traditional African headgear.