TikTok itself is banned inside China. Many western social media and news organizations are also banned there. The precedence is already there.
The difference between trolls and bot farms and manipulation directly from the social media platform is gas lighting is significantly easier. The platform has all of a user's graph data and can directly measure engagement with manipulative content. If they detect any engagement they can push less subtle manipulative content and accelerate as they measure increased engagement.
Trolls and bot farms don't have the same level of feedback. They're certainly not ineffective but their targeting is not nearly as precise. TikTok in particular is problematic in that Chinese intelligence services have direct access to and influence on the platform.
This is concerning not just with telemetry and graph data but also influence campaigns. Because the weighs in "the algorithm" of any social media feed are completely opaque to the end user there's no way to know the difference between organic content, stuff the user engaged with knowingly, and content inserted to wag the dog. This is used by platforms for advertising but works the exact same way for manipulating for any reason.