"It didn’t go unnoticed in Frankfurt that Visa and Mastercard suspended operations in Russia in March 2022 after the invasion of Ukraine……Thirteen of the 20 countries in the euro have no domestic card scheme. You use an international operator, or you pay in cash."
It hasn't gone unnoticed that the US is threatening to invade an EU country's (Denmark) territory, either. Would a future President Trump or President Vance threaten to shut down European financial infrastructure if it opposes an annexation of Greenland? Who knows, but better to take away that opportunity for leverage.
The plan is that you can link it to your bank account or open a special account at post offices throughout the EU. There will be phone apps for payments and digital Euro debit cards. Visa/Mastercard & Apple/Google Pay typically charge 3% fees; the digital Euro will have none. That will ensure it is speedily adopted by retailers and quickly supplants the US providers. Also worth noting its technology will be 100% European only, leaving zero vulnerability/leverage to non-Europeans.
Digital euro: what it is and how we will use the new form of cash - The European Central Bank is determined to break the US grip on card payments
It’s a public service for people in the EU and businesses operating in the EU paid for by EU taxpayers. So I doubt it will be rolled out outside of the EU. It still cost money to operate the service eventhough it is provided for free. If it ever gets to work outside the EU it will probably only be for people that have EU residency. No way they want to subsidize the transactions for people from outside of the EU with EU tax money.
If it works and grows, the service could be SOLD to foreign entities