That it took this long for Big Tech companies to take fascists seriously enough to remove some of them from social media should serve as a wake-up call: Elites tend to realize the dangers of fascism only when violent flash points hit close to home. It is workers and historically marginalized people who are—and always have been—the anti-fascist front line. If progressives are to ensure that technical systems aren’t yoked to a far-right agenda, they’ll need to stop relying on legislative maneuvering or entreaties to corporations and, together with these frontline actors globally, vie for control over the infrastructure itself.
I read this as "I believe that Democrats have a grip on Big Tech" (that's the point of many trumpists, she seems to agree with them). But instead of presenting it as a bad thing, she thinks that it's not enough and the control over the infraestructure should be stronger.