There are a couple of Indian apps[0] trying to replicate Tiktok functionality. Many of them saw a surge in usage after Tiktok got banned. Not sure about the current numbers though.
The issue there was collection of massive amounts of public data by Facebook. Open data APIs can be used to build nice things, if the data isn't user information.
[0] https://indianexpress.com/article/technology/social/mitron-c...