Taiwan is already independent. Surely the normal way to refer to it would be as coming out against assimilation with mainland China?
The Taiwanese government has never formally declared itself independent from the mainland. Such a declaration would likely cause the PRC to invade.
That is a very controversial statement, and one that both Taipei and Beijing disagree with.
I suppose, though that's not really how I tend to see it phrased on socials or in the media.