The testing of the downvote button continues with a limited number of Facebook users, but now this feature rolls out to those in Australia and New Zealand. Just as before, this button allows the users to provide feedback about the comments on public posts, so the dislike button remains nothing more but a wish that Facebook continues to ignore for the time being.
https://www.notebookcheck.net/The-downvote-button-now-tested-by-some-Facebook-users-in-Australia-and-New-Zealand.301684.0.html