is granted immunity from further prosecution and only after her appeals of her conviction have progressed through the courts. However, she will testify immediately if she is granted clemency and released from prison. That's according to her attorney. So, its not likely she will testify openly anytime soon.
https://www.washingtonpost.com/national-security/2025/07/29/ghislaine-maxwell-wants-immunity-questions-advance-testify-congress/