When they cut off communications at the behest of the government, they are state actors subject to the First Amendment.

John Hinderaker writes,

a sense of urgency is mandatory. Our freedoms are slipping away, and we need to move aggressively to reclaim them.

Read more here: https://www.powerlineblog.com/archives/2021/07/censorship-is-here-what-to-do-about-it.php