OK so it's firmly in the "not reasonable" territory for tourists. Just pay cash or credit card. Tourists aren't going to wait a while for a Brazilian tax id then use a Brazilian bank account before their trip. Just to select Pix as your payment method instead of card you already have in the Uber app.

This isnt a take down of Pix. Sounds excellent and should be replicated in other countries. Lets just not pretend its a viable solution for tourists.