They’re not actually relinquishing any control. They’re just allowing subsidiary “app stores” to take a tiny cut while Apple still controls everything.
I’ve been an Apple fanboy for years, but less so these days. I can’t imagine that the EU won’t fine them for this, although it’s hard to imagine any fine that would make an impression on a $3 trillion company.
At one time, they could’ve. These days, after decades of takeover by Repugnicans and their Chamber of Commerce masters, I doubt it. Even if they still can, the real question is “Will they?”