There is no detail at all about what caused these accounts to get suspended. The Guardian just wants us to blindly trust this leftwing propaganda group when they say it was due to political censorship rather than a consistent application of Facebook policies.
Feels a lot more like the reporter already had a problem with Meta and chose the examples most favorable to their anti-Meta slant to report in the article. Of course on HN we're all just to happy to eat it up as it aligns neatly with our little bubble. Here's some still publically available posts from Sex Talk Arabic who they directly quote in the article complaining about these shadow bans. It makes it a lot harder to trust the reporting here when these examples were so easy to find.