According to a blog post on Wednesday, TikTok is set to make the accounts of TikTokers who are aged between 13 and 15 private by default. Several updates have been made by the application to its privacy policies aimed at younger users with these changes being a part of them. In another change, only friends, or no one at all, will be able to comment on the videos.
Good parenting is preventing this app on your kid's devices. :)