Reality is that while China blocks Facebook, Google, etc and smartly props up their own clones, it’s “aghast” at the American protectionism and xenophobic behaviour. How dare the Americans block a Chinese app?! China is not a democracy. It’s not interested in fairness. China is playing the long game. Just like the wars of the past were fought with little toy armies of a few thousand knights and noblemen marching into…
China has a restrictive internet where if you want to operate, you have to comply with a certain set of rules that are unsavory to say the least. Facebook, Google decided to not bother instead of complying to those rules, but they very well could have, Bing and Amazon is in China.
Tiktok's US branch did not violate any US law and its being prosecuted with administrative action, which is why your equivalence is false - The actual equivalence would be to make laws that enforces ownership for social media companies and make them store their content in location. And enforce those laws, like China did.