Contrary to the law's assumption, news is worth hardly anything to Meta, so they just stopped showing it.
Does the Australian law really say:
1. You must show news, even if you don't want to
2. You must pay to do so
3. The rate will be determined by negotiation with the people you are paying
4. You cannot say no to them in aggregate
I have my doubts, but if it does I still doubt it will get the results the govt wants. The problem is news is not valuable to Meta.
We owe them nothing
Every economy should get value for its resources - no country is obligated to sell things unreasonably cheaply - people's time & attention included.
You may not want to obey the posted speed limits or pay something the law demands, but that's not about a contract you sign or don't, it's a decision made by a sovereign nation.
Meta will have the option of not posting links to Australian media. But if it does post that, the law applies, and "agreement" is irrelevant.