TikTok Faces ‘Pile-On’ Pressure From States After Indiana Sues

States scrutinizing TikTok Inc. are expected to follow Indiana’s lead in suing over the app’s potential risks to young users’ well-being and concerns about data-sharing with China.

In a pair of first-of-their-kind lawsuits against the social media platform, Indiana Attorney General Todd Rokita (R) claimed that TikTok misleads consumers about its age-appropriateness and its protections for shielding US user data on the app, owned by Beijing-based ByteDance Ltd., from access by the Chinese government.

The litigation, filed Dec. 7, is likely to usher in a “pile-on” effect with other attorneys general bringing similar actions in their states, said Fred Cate ...