Did you read the article? They started ivermectin in the middle of that wave and their cases went from 414,000 cases and 4,000 deaths per day to almost zero in FIVE WEEKS
Daily figures for August 5:
Uttar Pradesh on Ivermectin: Population 240 Million [4.9% fully vaccinated]
COVID Daily Cases: 26
COVID Daily Deaths: 3
Delhi on Ivermectin: Population 31 Million [15% fully vaccinated]
COVID Daily Cases: 61
COVID Daily Deaths: 2 …
Meanwhile Tamil Nadu is not using Ivermectin: Population 78.8 Million [6.9% fully vaccinated]
COVID Daily Cases: 1,997
COVID Daily Deaths: 33
https://wentworthreport.com/2021/09/11/ivermectin-wins-in-india/
The Indian government approved limited use of Ivermectin for mild cases and HCQ to healthcare workers exposed to Covid patients just as the delta wave peaked, with no research studies to support their decision.
This is in line with American drug maker Merck's statement that they found
~No scientific basis for a potential therapeutic effect against COVID-19 from pre-clinical studies;
~No meaningful evidence for clinical activity or clinical efficacy in patients with COVID-19 disease,
~A concerning lack of safety data in the majority of studies.
Suggesting ivermectin was the reason the delta wave in India subsided, is very much like suggesting wearing a mask stops the spread of the virus. You'd like to believe it, but hard science doesn't back you up.