https://arstechnica.com/tech-policy/2021/02/facebook-bans-all-australian-news-content-over-pay-to-link-proposal/

Facebook has gone nuclear in its long-running battle with the Australian government over news content. Australia is considering legislation that would require Facebook to pay to link to Australian news stories. In response, Facebook has announced a wide-ranging ban on users linking Australian news content.

The ban means that Facebook users in Australia can no longer make posts that link to news articles—either in the Australian media or internationally. Meanwhile, users outside of Australia can't post links to Australian news sources. The ban has already gone into effect, as I discovered when I tried to post a link to The Sydney Morning Herald on Facebook: