Apple users in India are negligible. There are just 10M iphones in India compared to 300M android users. Of course that number is just 1/3rd of Canada's 30M iphone users.
That's phone users, not Apple iPhone specifically.
You are totally right. My bad - searched for iPhone, clicked and was too tired to check properly.
Actually It is something like 25M total mobile phone users. But 30M is a reasonably good upper bound.
Apple Music is available on Android.
I had a bad experience with their app on Android. The collection is not great either.
I use Apple Music on Android, in India. (The list of Indian titles available in Apple Music has been impressive, so I am inferring from that there's enough demand to keep the catalogue updated.)