The short version is unless you follow that person already, you won't see them organically in any feeds. They could #JonathonKoren and you won't see it because they are effectively hidden unless you already followed them.
What Twitter is doing is absolutely political censorship.
EDIT: There are tools to detect the "Quality Filter" there is a hidden cam interview with an engineer from Twitter explaining it. Hardly conspiracy theory. I don't know why it doesn't seem to be an issue for you, or anything about your anecdote of not seeing it.
I’d take this a lot more seriously if this wasn’t being peddled by same folks that complain about “conservative purges” when Twitter bans a bunch of obvious bot accounts.
What makes this a conspiracy theory is the assumption of some grand covert political agenda. That’s really really hard to believe. Twitter is infamous for not enforcing their own TOS when it comes to hate speech or even calls for violence.
While I’ve never worked at Twitter, I’ve seen how fringe groups start spreading rumors of dark political agendas when it comes to these sorts of algorithms. It just doesn’t happen. It’s just spreading false outrage for clicks. It’s bullshit sold to people desperate for validation of their unpopular ideas.
I think this is performance.