Further to what @KaiHD has mentioned, in Australia, merchants are
LEGALLY ALLOWED to pass card payment-related charges (MDR, terminal rental etc) to consumers if they choose to (normally between 1.0%-2.0%).
Locally in Australia, there is a locally operated Card Network like MyDebit called "eftpos". Generally, there are 3 types of merchants that I have met:
1. Don't charge surcharge at all (typically larger companies who can stomach the fees).
2. Discriminate between Visa/MC and eftpos, with the latter not being charged a fee (like Aldi and some restaurants).
3. Charge surcharge when you use *whichever* card for payment.
Initially when Apple Pay launched in Australia many years back, only Visa/MC/AmEx is supported. eftpos was a relatively new addition to Apple Pay (Google:
"Apple Pay Australia eftpos support").
Since the merchant can legally pass card charges to consumers so long that they indicate upfront, consumers can choose which payment method to use (Cash, eftpos or Visa/MC).
Hopefully one day MyDebit would be supported in Apple Pay; could be a very long shot. However the good news is that PayNet (operator of MyDebit) has gotten approval for Token Service Provider from the EMVCo.*It surprised me that Aussies don't mind the 1-2% charge for convenience even if the merchant offer 0% charge for eftpos. All it takes is for the user to pick eftpos and reauthenticate with Face ID*

we are working hard to meet the deadline next year. knowing apple abit "kerek", missing the deadline means we will be moved to the end of the queue.