As far as I know, Elon Mask was forbidden to do this at all because earlier, when he spoke about the Dodge Coin, he had a lot of lawsuits for the fact that he was not doing what he should be doing and people like him, or rather famous, or how he is not the right to advertise some financial products
It's true, last year Elon Musk got a lot of lawsuits for tweeting too much about Dogecoin, but because he is a rich man he decided to buy the Twitter platform, that way he was finally free to tweet anything on his platform.
In fact, it doesn’t matter who owns this platform and I’ll throw it off not because he writes on someone else’s platform, but because he would like to write such news in general; he was forbidden to write such news on any platform, regardless of whether this platform is his or not.