If I recall from the algo weighting dump they did last year, Elon is hard-coded to be basically the absolute most important thing to the sorting algo with a pretty long decay time. When he posts, it's effectively guaranteed to be in all Twitter users' feeds, and that's how he wants it.

Then again, I don't know first-hand; I quit Twitter many months before it got this version of Billionaire Buffoonery as an owner.