I do international business payments all the time and most of them cost 0.15 EUR and are easy to both accept and send. More expensive ones (those outside the EU) can cost 3 EUR and have a exchange fee of 0.5%. And as far as I can tell prices are going down. I had to pay 0.3 EUR in 2019. Most transactions take like 2 bank days, but that is no big deal since most invoices are for 14 or 30 days.

To me it is unclear what issue there is to solve unless your country has messed up banks.