Trump´s presidental order

In yesterdays pres order rump adocates free speech. He does think that he should be able to post anything on social media, because he thinks internet is like a public square. I agree. But that does not exclude Twitter to make their comments, does it? I mean, the owner of the square has some rights.
At the same time Trump does not think that China has the right to express their views. In the same order Trump thinks that China is using disinformation. How could that be? What is disinformation? Isn´t it true that if Trump could call the views of China disinformation, then Twitter has a right to call Mr Trump´s views disinformation? We all want free speech.