Technically it should not be an issue since Taiwan does not exist on paper and therefore China's CCP should have no problem asserting full control over TSMC operations. At least if we believe the CCP's version of the world.
Taiwan is a region and a very important one, no one was denying that, even the Chinese government. The dispute was on what a country means and it has complicated historical reasons on both sides. Same thing goes for why Guam and California are not the same political entities among the US, or why Spain doesn't recognize Catalonia.
Don't be ignorant and try to judge on things you don't fully understand.
The UN is pretty clear on the fact that populations can claim to be governed by themselves if there are enough of them. Which is exactly what is happening with Taiwan. What is so difficult to understand?
Don't be ignorant and try to judge on things you don't fully understand.