So yes and no.She hasn't been blacklisted. That's a made up rumor unless someone has proof or at least a source.
Essentially, she actively spoke out against IR scenes with black men, saying it is inherently racist and that she’ll refuse to do it. This sparked a back and forth with some producers and other actors that ended with them saying they don’t want to work with her, and her saying she’s quitting the business all together. So not an official black list, but many consider it because nobody will offer her jobs after this but she also doesn’t want to work with them in the first place anymore.