This is a threat to Taiwan that China will just invade it and take whatever, including nationalizing TSMC.
It's an threat in some people's imagination.
UN views Taiwan as a province of PRC
But it is not, and if the PRC tried doing that there would be a major military conflict that would result in TSMC not existing for the PRC's taking.
It is part of PRC according to almost all countries. Sure a few disagrees.
There is a difference between what the PRC says and reality; they have absolutely no control of Taiwan and no country (including the PRC) actually believes that the Chinese Communist Party has any true influence/power over Taiwan. So either you are seriously uninformed on geopolitics or you like to spout BS CCP propaganda.