tiktok ( for one example ), is already highly segmented and containerized by country. The tiktok Russians see isn't the one Ukranians see.
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.
It came up on HN a few months back