(I was editing when you repplied so I'll add it here for you:)

And just to add, you can have "chargeback" for PIX as a separate service, most banks offer PIX insurance that is basically CC chargeback by a different name. But the key is that it is separate from the payment infrastructure itself, it is an insurance service that you contract separately. And that separation ins very important, the insurance company can't roll back transactions arbitrarily, or deny people access to the financial system, they have to pay the victim and then claw back their money in court, which is the appropriate venue to decide who is right or wrong in a transaction.