In a sane world, the US as a supposed bastion of free speech and personal liberties would enact legislation that requires companies to provide a specific, articulable reason for suspending accounts due to rules violations and offer everyone the chance to appeal. That would serve as a counterbalance to more authoritarian regimes insisting companies like Meta censor people, even if the US can’t guarantee it for people…
You don't have a constitutional right to post on Facebook. When you invest your life into platforms run by for profit corporations, you agree to play by their rules. Merging state and big tech is not going to help.
Which is why OP describes the U.S. enacting legislation creating a statutory right.