If something is "removed", that logically implies that it was there at some point in the past. Technology exists which can archive the state of webpages at the current point in time. If someone is believed to do something habitually, and others wish to gather evidence of that conduct, they might prepare in advance. I assume I don't need to connect the dots here.
If something is "never added" it serves the same purpose as removal. Even more so -- there is no evidence and none was ever available. I assume I don't need to connect the dots here.
If you do not think Elon could be controlling the moderation of his own account then you are either hopelessly naive or responding in bad faith. Either way, I will not be responding again.
But of course he can turn it off. He owns the entire platform and algorithms on it.