There is so much content supporting this thesis with a 5 second google search.

[1]:https://www.hrw.org/report/2023/12/21/metas-broken-promises/...

As I have mentioned above and in other replies. Meta platforms has quietly introduced a filter for certain political topics that was pushed to their user base with no notification.

[2]:https://www.reuters.com/world/middle-east/meta-limit-some-fa...