Matt Taibbi has been doing the best work that I’m aware of on this topic in the last little-over one year. The Democrat-aligned corporate media have done a great job of convincing their readers/viewers that he’s a crank and that it’s all a nothingburger over Hunter Biden dick pics. This is not so. Taibbi is a seasoned, old-school investigative journalist, not a partisan hack like his critics. (He’s also a lib, but then they all are.) He mentions in some of his articles & podcast episodes that the left will ultimately be the target, but I’m not aware of him documenting the very recent leftist/pro-Palestinian account deletions specifically, at least not yet. Most of what he covers is about the “algorithms,” shadow-bans, and Blob-backed NGOs that work with the social media companies to get content spiked.

Branko Marcetic @ Jacobin, Dec. 2022: Why the Twitter Files Are in Fact a Big Deal

They suppress and silence Arab voices. We have to resort to ciphering our words e.g. غـ.ـزة instead of غزة. Even our media accounts such as Aljazeerah have to do this on YouTube and other platforms

you can say "the ccp is spying every chinese person in their social networks in an abusive way...but actually, instead of being the "evil gommies" are private enterprises with monopolies, and rather than chinese persons, are the western people!"