Censoring individual twits is one thing, but banning entire account is a different thing, because now it restricts your ability to interact with elected officials.
Besides, equal time rule demands that TV and radio stations(private and public) give equal time to competing politicians. There are exceptions, but logically it should extend to social media and video hosting sites, because they are today’s version of radio and TV stations.
On top of that, I would argue social media became the only mean of public assembly, which is a protected right, during Covid lockdown. Politicians pay attention to twitter, you can’t assemble by the city hall with banners to express your opinion, because you are to stay home. The next closest thing is to swarm twitter and facebook, given how closely they watch trends there.