Both those graphs cut off Feb 1. Delhi reported no COVID deaths Feb 10 :https://www.bloomberg.com/news/articles/2021-02-10/india-s-capital-reports-no-virus-deaths-for-first-time-since-may
HOWEVER: by April 24 : https://www.nytimes.com/2021/04/24/world/asia/india-coronavirus-deaths.html
Do we know what happened in between?
WHO came out against ivermectin and many parts of India dutifully stopped using it.