Earlier quoted context omitted.
>Antitrust doesn't require a monopoly. Yes, it does. https://www.justice.gov/atr/monopoly-power-and-market-power-...
Did you read the link you just posted? Seriously. It clearly states what I said, and contradicts what you said. As per YOUR LINK, you don't need a monopoly for antitrust; just "the ability to raise prices above those that would be charged in a competitive market." Apple unambiguously has this with their app store.
However, several of the claims Epic made in their lawsuit do require proving that Apple has monopoly power, which is going to be a difficult argument with their current 46% market share.