I'm still amazed that people are talking about TikTok as a technology or a company or something. They're completely, maybe willfully, blind to the reality of it.
TikTok is a weapon. It operates under the direct and total control of the Chinese Communist Party, and its algorithms and policies and the second-order effects of those things are aimed towards advancing the goals of the CCP. They would not tolerate its existence in any other case.
The algorithmic disparities between the Chinese mainland version of the app and the version in western nations is well-documented and extreme. Anybody with access to both installs can see it for themselves. The mainland Chinese version serves up wholesome and intriguing subjects and topics, like science, space, engineering, art, and other enriching content.
The Western userbase gets brain rot and socially-destructive memes like eating tide pods. Again, TikTok is a curated algorithm. The userbase is getting those because those at the levers of the program consciously want that content aimed at that audience.
That is as clear an example of a socially weaponized piece of software as you're likely to get.
Talking about "should we regulate TikTok?" or "should we teach kids how to be smarter about TikTok?" is approaching it as if it is something like Facebook or Google. But you don't talk that way, with those mindsets, about a gun that is actively and literally being used to shoot you. And that is what TikTok fundamentally is.