A democracy is dependent on people having access to information. Free information is a direct requirement of any democracy. It just isn't the only requirement of course.
Right, and it's far from the only one the PRC is lacking. If a tyrannical dictatorship hypothetically permitted free speech, it wouldn't be a democracy. The most conspicuous lacking feature of a democracy in the PRC is the lack of legal competing parties and elections, so it's strange to hear that China isn't a democracy because they don't have free speech.
Incidental to that, free speech as a qualification of democracy is less than cut and dry; every democratic country recognizes some limits to free speech, be that as simple as libel and slander laws, wartime censorship (as America had during WW2), or even hate speech laws like most of the democracies other than America have. If absolute free speech is a prerequisite for having a democracy, then no democracy exists. If you concede some limits, then we're just quibbling the details. Probably, America "" banning"" tiktok still qualifies as having free speech since it's still legal for Americans and American media companies to say nearly anything they like, limited mostly just by slander and libel laws (e.g. infowars getting sued for saying Sandy Hook didn't happen.) Certainly on the spectrum of speech freeness, America is far further on the free side than the PRC where you can get your organs harvested for saying that the government should be replaced. The supposed irony guappa was talking about up-thread is farcical, you have to be out of your mind to think America and China are even remotely close to each other on the speech freeness spectrum.
No tyrannical dictatorship ever permitted free speech because it would pose an immediate threat to their rule.
Competing parties is an indication of a working democracy. Theoretically everyone could agree with a single party to rule. Edge case and very unlikely of course. But there is a reason freedom of opinion is a human right instead of the freedom to have multiple political factions. It isn't comparable.
In contrast to that freedom of speech and expression is a fundamental requirement. For parties forming in the first place for that matter. It is a right that can be abused and different countries deal differently with that problem, although the technicalities should be very carefully considered here.
I don't believe TikTok is an essential part to freedom of speech, but it could very well suppress voices otherwise unheard. Even if I disagree with most of them, there is a restriction.
I do believe the decision against it is populist drivel though and I agree that there is a stark difference between China and the US in offering freedoms. China banning foreign platforms is a sign of weakness in their convictions and they are afraid that different ideas would challenge their order.