In general, technology platforms are usually protected by the so-called section 230, a legal mechanism that prevents them from being held responsible for their users' publications. It was on this basis that a court had dismissed the case.
However, the high court later ruled that the speech in question was TikTok's own, sending the case back to the lower court for reconsideration. Now, it will be up to her to determine whether TikTok can be held responsible in this specific case. The accusations also involve APP's alleged negligence.
It is worth pointing out that section 230 only protects these sites and applications from being held responsible for how they handle third-party speech, such as their users' posts. In this way, TikTok's actions themselves, such as the recommendations that the app makes to those who use it, could be outside the scope of its protection.