While I agree in dismantling monopolies, I am not sure by what measure you have Apple as a quasi monopoly with Android? By which metric are you referring to?
If by the number of units sold, Apple doesn’t have a monopoly. They are far from that.
If by the number of customers, Apple doesn’t have that either.
Everyone keeps bringing up Apple as a smartphone monopoly. How?
The problem with this line of reasoning is that iOS is a monopoly regardless of whether Apple has sold one billon iPhones, or just 1, simply by virtue of you not being able to run any other OS on it. It's like saying that Nintendo has a monopoly on Nintendo Switch consoles, because even if a third party is able to replicate the hardware, they lack access to the software running on it, or access to the Switch App Store, and therefore would not be able to make an equivalent product. It's technically true, but it doesn't really mean anything, because he can still release his own competing console. That he may lack the resources to do so is not the problem or the concern of any other party.
Same here. The reason why there are only 2 main smartphone OSes today is because the market has decided that it is simply not financially feasible to support a third offering. Developers may not want to support a third App Store either. It is no longer enough to come up with a new smartphone model. You need to be able to offer (and sustain) your own competing ecosystem and App Store if you want consumers to consider your product over android or iOS.
So in summary, I really don't see Apple as a monopoly because they are not stopping new entrants into the market. It's everyone else who has decided that they are not going to compete because of the huge financial barriers to entry. It's a "them" problem, not Apple's.
Everyone just wants to hate on Apple because it's categorically cool to do so. It was the case when Apple was still the underdog, it was the case over the last decade when Apple was perennially one flop away from implosion by some new Android offering, and now, I am, if the narrative is to be believed, trapped inside a massive walled garden, while government regulators are viewed as the only entity capable of protecting Apple users like myself from Apple.
Anyone believing this narrative is only setting themselves up for failure, and continue disappointment. That's why I am not really worried over what is going on with the EU. It's all just noise by people looking someone to blame for market failures (*cough* Spotify *cough*) when the problem is found internally with a bad vision, inadequate corporate culture, and lack of understanding as to what makes Apple unique.