I think this is true for other European governments. The UK is has introduced age verification (although not mandated an app) and is pushing for digital ID. If digital ID meets too much pushback plan B is a boiled frog approach by introducing it for children first (the legislation for that is in its final stages).

Governments say they want sovereignty but not if they have to pay anything for it. They also like the fact that forcing everyone to do everything through a few big businesses makes surveillance and censorship easy. No need to pass laws, just do deals with a few companies. Governments are all about central control, and its more important to them than what they see as obsolete nonsense about sovereignty.