I'm taking this with a massive pinch of salt. Is Khelif really suing Rowling and Musk for what they said about him (her)? I very much doubt that an Algerian, using the French courts, could successfully sue people based respectively in the UK and the US.
As for the new case, what on earth is he suing for, and who is he suing? Is he suing Reduxx for publishing private medical information and/or the leaker from the IOC who supplier the private medical information? Because if Khelif is acknowledging that private medical information has been published, then he is also acknowledging that the story is true.
Alternatively, if Khelif is insisting that he has XX chromosomes, then he must be suing for libel rather than breach of privacy. Good luck with that.