The EU does not risk invoking the "wrath" of the "much more powerful" US government by telling Apple to stop abusing it's customers, market and developers.
You have progressive states passing similar legislation as the EU within the US so I bet they'll be getting the firm hand first if anything.
The US government doesn't really take kindly to other states trying to reign in its companies. This is something that has bipartisan support. Even American politicians who support regulating Apple, only support _them_ doing this. Is this good? No. But it's also how Europe treats other countries. Basically: think about what France would do if Mozambique ejected or otherwise restrained Total -- that's roughly what Americans would do.
If states get too onerous the Feds will pass similar, very much less restrictive legislation, which will have the effect of nullifying state legislation due to federal supremacy.
You have progressive states passing similar legislation as the EU within the US so I bet they'll be getting the firm hand first if anything.