> it's clear that Apple doesn't have the will to kill their apps over it.

Well, Apple did threatened to remove Facebook in the past, and they did get Meta to follow the rules back then

But, today, unfortunately I think you are right. If Apple bans Facebook, Meta will take the opportunity the EU has given them to start their own app store, which can have whatever privacy rules (read: none) they want.

I guess it's just another Brussels Effect.