Sometimes actors get into stuff because of connections. This definitely seems to be the case for Zendaya, Florence Pugh, Woody Harrolson, the rock. It was true for Amber Heard too, who despite being good looking had the charisma of a narrating a technical manual.
She lost her connection, and now she's nowhere.
In the case of Zendaya it might also be because she is an easy person to make a cast diverse, without all the niggerish behaviour that you have to deal with. When you have unscripted and unaware moments of being filmed she seems to be very well composed and does well with all the networking that you do for movies. If only she could act.