I am certain they sell a lot of servers to China. I agree with you that there are citizens who want reunification with China. Despite China funding and promoting unification lavishly the numbers are falling. Last poll I could find from 2024 is that it is only 6.7%.
You are correct what they did is a violation of American law. I could not find evidence but my gut tells me he also violated Taiwanese law. Taiwan does not want to lose access to Nvidia chips as an untrusted partner.
https://en.wikipedia.org/wiki/Chinese_unification#:~:text=Th...