I am visiting India. The app wasn’t installed automatically. I received the SMS telling me to install the app but I am using an Indian sim borrowed from a friend. So I figured I got the SMS because of Indian sim. My wife didn’t receive sms as she is using Airalo esim data service.
I didn’t know the SMS was legit or not and I just marked it as spam. The challenge I have found with mobile in India is the excess of sms spam. Also the sender is always some cryptic alphanumeric characters so authenticity is difficult to judge.
Apple's geotargetting was at least in the past tied to where device was sold. Example is FaceTime in UAE: phones sold there will never have working FaceTime anywhere but if you bring your American phone in, it seems to work.
But easy enough to tie it to iCloud region - you have to set your device and iCloud to Indian region to be able to use many of their region specific payment methods (ie UPI)
