Yeah, "Le media" and "Mediapart" are "left wing" newspaper and not billionaire owned, there is right wing too, but they are smalls. Libé isn't owned by Kretinsky but Patrick Drahi, Kretinsky owns Mariane (right to far-right now...).
But anyway yeah, in France (and in other countries too ) there is a media oligarchy.
Check the France problem: https://www.monde-diplomatique.fr/cartes/PPA https://www.monde-diplomatique.fr/IMG/png/poster_medias_fran...
Other countries with broken media ecosystem: - Australia: https://www.theguardian.com/commentisfree/2024/mar/17/the-br...
But also USA and Poland for example.