What are you talking about? When have you last been to Europe!? Of course you can pay with debit cards all over Europe, every card terminal accepts them!

Online the same, you just use your card details like a credit card, the payment system is the same for years now anyway - thats the whole point of initiatives like this digital euro and Wero!

Direct debit is not the same as debit card. You can pay in physical stores with debit card but not with direct debit (which does not involve a card at all).