Did they even have authority to take down posts? That was always Meta's call. The fact-checkers -- which were separate news orgs -- would tag posts.
Not really. Because if you make the argument that it was censorship then you have to say that any feed that is generated by an algorithm is censorship because the company is determining what, among what all users post, you should see, allowing certain posts to bubble up to the top and others to fall to the bottom.