Yeah but swish and BankID are owned by the Swedish banks and thanks to that they are not interested in partaking in many of the cross border systems as they don't want competition in Sweden.
Sweden may be progressive in some ways but we are completely backwater when we allow the banks - who constantly get caught in laundering schemes - to control vital infrastructure.
They are also refusing to integrate their apps with "competing" id apps such as Freja. If the authorities expect them to profit from infra there needs to be regulations for these things.