I haven't been following this story -- has Frances Haugen actually revealed any fraud or illegal activities? This disclosure, while interesting, seems to fall

I haven't been following this story -- has Frances Haugen actually revealed any fraud or illegal activities? This disclosure, while interesting, seems to fall squarely under material that should be kept confidential. As an outsider looking in, I'm wondering if she joined Facebook solely to collect a bunch of material she could disclose to the public, which seems unethical.