http://newsdesk24x7.com/why-has-pfizers-vaccine-application-for-india-been-turned-down-for-now/
Other coverage indicates Pfizer did not want to pursue local trials, so they dropped their application.
Some intersting discussion here too:
Well India are probably a bit more critical, or realistic, regarding vaccines due to past issues:
https://abcnews.go.com/Health/wireStory/polio-cases-now-caused-vaccine-wild-virus-67287290