To me that sounds like it's intended to cover comments made on posts on the news business's own Facebook page, rather than comments made on other pages or personal profiles, etc.
This is because Facebook requires page owners to assume all liability for comments.
This has resulted in publishers losing defamation cases based on third-party comments made on their posts [1].
* (regardless of whether you feel, as I do, that the proposed legislation is a politically-motivated protection racket for a favoured media mogul)
[1] https://www.theguardian.com/media/2020/jun/01/australian-med...
2. Facebook didn't require publishers to be liable. The court did.
2. Thanks - poor wording on my part. I meant to communicate that Facebook avoids liability in their terms, and of course the court determined the actual liability falls on publishers posting content.