Yeah i shared with relatives by taking a screenshot of a tiktok to show them the news

It's completely irrelevant whether they have done it or not. The only thing that matters is the fact that they can do it.

We're not going let you have nukes just because you haven't nuked anybody yet.

Also the idea that a country that has built the most extensive digital surveillance apparatus in the world will somehow avoid the temptation to use TikTok to monitor people abroad..

It's beyond naive.

I agree the evidence is weak, and circumstantial, but it is not true that there none. Quick overview of some of it (which includes critique of it):

https://en.wikipedia.org/wiki/Censorship_by_TikTok