It seems that of those, the only one that had anything to do with suspensions / bans was the Occupy accounts and those (according to the article) seem to have been tripping the "might be a bot" thresholds because of how they don't post for a long time and then all of a sudden all blast the same content from the same protests.

While they shouldn't be banned (and I'm assuming that was fixed after that article came out if in fact they were not bots), I haven't seen any examples of specific left wing accounts getting banned for posting content as many on the right have (examples: Hunter Biden stories and the NYP, anyone posting Wuhan Lab leak theory in 2020-2021, The Babylon Bee for the Rachel Levine satire posts, etc).