Emma Bowman. After Data Breach Exposes 530 Million, Facebook Says It Will Not Notify Users. NPR, April 2021. URL: https://www.npr.org/2021/04/09/986005820/after-data-breach-exposes-530-million-facebook-says-it-will-not-notify-users (visited on 2023-12-06).
This is a news source that talks about Facebook's data breach and how the data was published to a hacker group's website with lots of information, which wasn't super sensitive, but people most likely would not like being publicly available. The source also talked about how Facebook did not notify the users whose data was breached about this event.