What would this be applied to? Let's check the freshly printed report by the "Special Panel on child safety online and potential age restrictions for social media" (https://commission.europa.eu/document/download/d833504d-5ec3...).

We have a definition at the beginning, for "Social media and other digital services (in short, social media+)":

“Within the scope of this report, the terms ‘social media+’ and ‘social media and other digital services’, are used to broadly define services that may be available to minors and contain age-inappropriate and/or risky features (for example, addictive and harmful features, among which infinite scroll, autoplay, recommendation algorithms and persistent notifications) and/or content. Social media and other digital services providers include online platforms serving as intermediaries of content from third parties, such as social media, as well as app stores. AI systems posing risks to minors’ safety and development, including AI companions, video games exposing children to harmful commercial practices or dangerous contacts, and video-sharing platforms enabling age-inappropriate access to minors are also included.”

So, let's see, services that may contain age-inappropriate and/or risky content, "online platforms serving as intermediaries of content from third parties".

How quickly can you come up with something that wouldn't fall in that definition?

It seems that anything that allows user-contributed content (such as plain old forums) or communication among users would be comprised in it.

And, yes, to be sure we explicitly include app stores (I guess including e.g. F-Droid, and what about software repositories?) and video games with intercommunication features.

What is this definition used for?

Recommendation 1 of chapter 3: “A harmonised EU-wide access restriction to *social media and other digital services*, including AI companions, for children under 13 is necessary.”

This is a report, not law, but it was commissioned by Ursula von der Leyen and “The report is intended to inform future actions to be proposed by the European Commission and EU Member States to reinforce child safety online.”