Free for individuals, but paid if you're the business it seems from what I've found? If that's the case, it seems to be the same as a card in the US and I wouldn't be surprised if some businesses try to pass it on like they do with cards.
[0] https://www.mollie.com/growth/wero-payment-guide#:~:text=How...
[1] https://www.bnpparibasfortis.be/en/public/faq/how-much-does-...
Pix is Brazil is also paid by the merchants. ~0.33%.
Individuals is completely free. You can transfer even to people without bank accounts (and withdraw on places like corner shops and authorized merchants).
For companies certain transfers are free. eg: my company pays nothing, since I'm not a merchant, one of the banks tried to charge once and I just changed to another that offered 0% in return for keeping investments there.
Some banks offer extra services like POS machines with instant confirmation and so on (so the POS employee don't need access to the company bank account).
How much is in this case?