It doesn't need to be an authoritarian government. The US government can proclaim a company to be of "national interest" at any time and thus determine what it can export or not, as it has done repeatedly over the last few years.
Restricting tech exports is not the same thing as the government taking control of a company.
Really? Would the company subject itself to this otherwise?
No company would subject itself to any laws of it didn't have to either.
You're trying very hard to make it seem like China isn't doing anything different than western countries for some reason.
There's no way to really tell. An authoritarian state like China can decide to control this company at any time, if it chooses to, through more direct or indirect means.
A well known story on this subject: https://www.wired.com/story/jack-ma-isnt-back/