Earlier quoted context omitted.
You use your bank's phone app. You can scan a QR code or you can send money to someone if you know their "id string", like a phone number, an email or a random string of numbers - you choose the "id string" format you want, and you can have different "ids" linked to different bank accounts. There are no physical cards.
What happens if you miss-type the email or phone number when making a payment? Is there any confirmation of the persons name?
Yes, and it's a small privacy leak in Pix: it shows the person's name and part of their CPF.