From the release:
H.R.8922 ,the Breakup Big Tech Act of 2020 would take away legal immunity from interactive computer service providers that engage in certain manipulative activities, including social media companies who act as publishers by moderating and censoring content.
The full text of the bill isn't out yet, but it's my understanding that Section 230 immunity would still exist for companies that aren't actively engaged in shaping the content published on their sites. They should be fine as long as they're providing a true neutral platform that allows for freedom of speech.