Because china don't have reason to really care.
69% of the company’s 2019 revenue comes from china and U.S. accounts for 20%.
Meanwhile UK is third with just 2 % of the revenue.
The rest is world wide combined .India by itself barely even accounts for 1% of TikTok's revenue.
India has no alternative,India will just suffer in the yoke of politically motivated nationalism. Even if china makes money off India( which isn't much for them) ,it's not a one way ticket,they are still giving a lot in return in tech and experience while footing India's progress and development. India tried the self-sustainability for many decades,and it yielded nothing in return,0.1% laundered all the money while leaving the rest starving,and the services they provided are inferior at best,that makes the life of the masses inconvenient, inferior in quality.
India is doing china a favour,China will not foot the bill for a potential lifelong spiteful neighbour.
Indians is no East Asian.