Xi Jinping isn’t letting them come here
The Taiwanese universities would love to have them. With student numbers dropping, little ability to teach in English, no reputation as a provider of quality education, semi regular stories of international student interns being taken advantage of and killed, the universities are in trouble.
But for Chinese students who want to go abroad but don’t have the English or academic skills, Taiwan is perfect. Nearby, a lot of cultural overlap (except of course things like government and food), cheap, etc…