Looking at the Wero page, it's not very European if 4 countries are listed. I have never heard of it here in Slovakia, and none of our banks are listed, although some belong to the groups that are there. This will be a long process if it really wants to be European.
Maybe in Slovakia there is already an established payment system which uses instant bank transfers, so there is no need for Wero. Or maybe some countries are fine with PayPal (or similar) fees.