How many countries of the world have adopted UPI invented by India.

I've asked the question
(a) how many countries of the world have adopted UPI invented by India;
(b) the total transaction value of rupees registered by UPI in the country in the last three years,
the details thereof, year-wise; pic.twitter.com/TXXvi4u5ad

— Kartik Sharma (@Kartiksharmamp) March 21, 2023