The usual reasons monopolies are bad. Jio in particular is known for being highhanded in blocking websites. A couple weeks ago duckduckgo was unavailable on their network across India. [0] Last week, the government of India proposed some changes to the Environmental Impact Assessment (EIA) process which would make it easier for corporations to cause ecological damage without repercussions. A couple organizations published articles condemning these changes and explained the procedure to oppose this process, their websites were promptly blocked. [1]
[0] https://twitter.com/DuckDuckGo/status/1278288303532302336
[1] https://thenextweb.com/in/2020/07/14/india-reportedly-blocks...