What is your definition of far-left? Democrats? Because the latter are not left in any sense of the word, beyond being more "liberal" than the far-right Republicans.

No leftists I know push for platform-provided censorship, because that inevitably harms left voices; eg: facebook taking down Crimethinc and It's Going Down: https://crimethinc.com/2020/08/19/on-facebook-banning-pages-...