Thats like saying walmart has monopoly inside walmart store.Did you read the anti trust documents and fail to understand them?
Android does NOT matter for the EU´s case - as I have already mentioned!
Android is no competitor in the "iOS market" which is what the EU regulators looked at.
Spotify for example complained that Apple has different rules for Apple music - giving it an unfair advantage in the iOS market.
You saying - well buy an Android phone then, is not an argument the regulators will care about!
They are looking at the iOS app market - and nothing else! Is that so hard to understand?