We have UPI in India and it's pretty Robust.
My brother actually was part of deal in talks to have UPI pilots as a project within London as a project within his college and I remember him talking about how UPI (India) is in talks with other European countries too.
With the mother of all deals recently signed between EU and India. I sincerely hope that UPI can have access within EU markets too.
If you ever come to India, you can witness the astronomical rise of UPI. From street vendors to literally everybody now has UPI and it has 0 fees and is really great/one of the best.
As for our brazillian friends, I have heard that pix is great too and I have respect to pix as well plus its open source as well. Both Pix and UPI are really great.
Yes, there are local alternatives like Pix here as well, but they only work in the same country. I need something that works across EU countries, like wero. I also need something that works on every site when I buy online and I can also use it when renting a car. So a real Visa/Mastercard alternative.