Taiwan is a separate place from China, with its own laws and army. Mainland China has no right to stop the people of Taiwan from using the international Internet and free speech. But the people of mainland China still suffer from the strictest speech control and totalitarian dictatorship.
I think, strictly speaking, Taiwan is an independent country, which is called the Republic of China. In recent years, China's ruling party has been seeking to invade and occupy it by force, so that Taiwan will become in the same situation as Hong Kong is today.