> There is nothing the EU can do to enforce this.

Well they can turn back shipments at customs. And they can collect fines if any leadership of the company comes to the EU. If you stay outside the EU for the rest of your life, you're probably fine.

They can't jail you, but they can do quite a lot.

They can seize your goods. They can order app stores to take down your apps. They can order payment providers to stop doing business with you in the EU.

Most businesses would also prefer to avoid having outstanding fines in foreign countries even if they don't currently have presence there because it's a giant liability in case of looking for funding.