https://judiciary.house.gov/sites/evo-subsites/republicans-j...
Skip the political mumbo-jumbo and go straight to page 27 to 29 of this investigation report. Internal emails show FB employees unhappy to onboard to a private takedown request portal, where Government employees would post tickets on "disinformation" that FB & other tech companies would then be obligated to police. Further, the report suggests that CISA & its proxies didn't have a legal mandate to compel FB, Twitter, and other companies to censor content, so the CISA resorted to "suggesting" they would get the FBI involved.
The entire doc has an obvious political slant, but I think it partially explains why the Stanford Internet Observatory and other proxies self-dismantled before litigation commenced.