Ah wait, I should've read the article lol:

The law allows local authorities to name "designated providers" of a certain scale – currently only achieved by Apple and Google – and require those providers to do three things:

• Allow third-party app stores on their devices;
• Allow application developers to use third-party billing services;
• Enable users to change default settings with simple procedures, and offer choice screens for tools like browsers;

And it forbids them doing three more:

• Engage in any form of preferential treatment of their services over those of competitors in the display of search results without justifiable reason;
• Use acquired data about competing applications for their own applications;
• Prevent application developers from using features controlled by the OS with the same level of performance as the one used by Designated Providers.

So Google already allows 3rd party app stores and lots of settings (although these are always hit and miss, even in the custom ROM scene - I can't get pocket detection right now and my phone keeps doing things in my pocket), but the 3rd party billing and choice screens applies to them.

How do you acces your bank account without an app that requieres Google Play Services running? All bank accounts in Europe require a smart phone app for 2FA even when you log-in on a browser. I can install bank apps via Aurora, but almost all of them won't run without Google's Software.