I don't understand how Apple is getting away with charging other app stores. At most they could charge for hosting the either app store's app on their store, but that should be it. They have no other costs that they can justify since they aren't hosting, vetting, or curating the other store.
I think it's just that government bodies like the EU move slow so it'll take a while for them to bonk Apple, not that they're "getting away with it" in anything more than the short term.