Letting foreign companies operate locally is a boon for the locals. The reason China is threatening the US with superior products is because they let the US invest in China for so many years. One of the few advantages the US has over the Chinese economy is the CCP keeps denying their citizens access to effective tools and ideas from well run external corporations.
There is a strong argument to ban Tiktok because it represents a military/social threat. But that isn't tit-for-tat, if the US is persuaded by that logic it is meaningless what the Chinese regulators are doing on their turf.
Another one? I'd hope the genocide against Native Americans should be sufficient for quite some time. Or is that too long ago now?
Is it any wonder Americans allow this kind of tyranny when we refuse to teach our past in school? American exceptionalism is a lack of education.