Funny... never heard of her.... maybe because she was not the fist black supermodel nor "the first black African to become a global catwalk star in the 1980s."
I believe Iman (who is from Etheopia), was long before her. Iman also supports this cause and many more new and younger models use their voice for the same cause.
Another black model before her was
Donyale Luna who hailed from Detroit, but very few have heard of.
Wiki quotes "Of the prominent models of the 1960s, "Twiggy" (Lesley Hornby) is an example of a supermodel of the era, as is Donyale Luna, the first African American model to appear in Vogue. The first African American model to be on the cover of American Vogue was Beverly Johnson."
"In the 1970s,.... Other prominent models of the 1970s included Janice Dickinson, Cheryl Tiegs, Jerry Hall,
Iman Abdulmajid, Patti Hansen, Anna Bayle,
Beverly Johnson, Gia Carangi and Christie Brinkley."
Maybe she was only the European catwalks.