I don't think you'll ever be able to get a straight & correct answer to that question, but I don't think it really matters, because the effect is the same.
I and every friend I've talked to about tiktok has seen much more political content on tiktok than other short video apps.
You don’t think it matters whether you are viewing the authentic crowdsourced views of your countrymen, or the boosted political propaganda of an adversary?
I and every friend I've talked to about tiktok has seen much more political content on tiktok than other short video apps.