The fees for those are still often comparatively lower to the US rates posted above. Credit cards are also not popular here, so while I do own one, I suspect average % of a merchant still remains low. Amex also offers pretty good rates to low-volume merchants here to have more acceptance to my understanding.
The rates I posted are the full range. Because it varies yes.
You suspect average percentage is low but try to get a payment processor agreement and see within two years what you actually pay overall. It may get even above the rates I mentioned with fix costs the jeopardy to your business when a fraud does occur and the issuer blocks you from accepting any payment, or worse, accuses you of being the fraudster.
We are well educated by the financial system and VISA/Mastercard to believe this technology is for our own good. Many in the financial industry denounces their predatory practice, that of a cartel of 2 or 3 that imposed a dictate for decades. Things are finally changing, resistance will continue but you will see QR or some alternative will settle in.