No it isn't. The status quo is that Taiwan is a region of China, independently governed. This is the case for MANY places around the world, here in the UK for example we have Scottish and Welsh governments, independent of the UK government. Scotland has its own parliament. Does that make it independent? Fuck no it doesn't and there's no mechanism for it to leave either.

There are MORE people in Scotland that want Scottish independence than Taiwan. Chew on that for a bit.