Is it? I use tiktok and the app routinely tries to throw content outside my bubble at the wall to see what sticks, even in languages I don’t speak.
It is currently showing a lot of Argentinian videos on my feed even though I’m European.
I’m sure that the Chinese version is different and censored, but other than that my experience is that it’s tailored to your personal engagement patterns much more than to the groups you belong to.