The government instructed social media platforms to suppress "misinformation" that went against the official party line.
The government used extreme threats against platforms that did not comply.
> In an interview with MSNBC about anti-vaccine misinformation, White House communications director Kate Bedingfield responded to a question asking if Biden would change Section 230 to make companies “liable for publishing that information, and then open to lawsuits.” Bedingfield responded that “we’re reviewing that, and certainly they should be held accountable.”
https://www.theverge.com/22585152/biden-white-house-facebook...
I personally had a one decade old account banned on one social platform for asserting that Covid was airborne and many posts on other platforms deleted for sharing links that supported the airborne Covid theory as "misinformation".
We literally had platforms deleting links to information provided by sites like the New England Journal of Medicine or Nature if they didn't toe the official party line.