The question is, can you buy a car from a different manufacturer? When it comes to cars, yes you can.
Is apple a monopoly? Probably not, because you can also switch to android.
Does Apple have a large enough share of the market to influence the market? Likely, which is why the EU has DSA and DMA now.
No, the question is "does one company have too much influence over the digital economy". The answer is yes. Apple has influence over 60% of the population. They extract 30% from all digital transactions. If you want to sell digital content to iPhone user's you're required to give Apple 30%. That's too much influence for one company.
> The question is, can you buy a car from a different manufacturer? When it comes to cars, yes you can.
You can, but why would you if you have no idea that your Apple purchase comes with all of these negative consequences?
I would guess that most Apple users don't know the implications of their purchase, and therefore they have no real incentive to look outside of Apple. Garland even addressed this in his speech: Apple disincentivizes you from choosing non-Apple products. They make it look like their products are better, but really it's the opposite: they make their competitors look worse due to their own purposefully terrible interoperability.
Contrast that to an Apple Car that only lets you drive to Apple Grocery stores with a 30% toll: the user is going to see how bad that is and naturally they'll find better alternatives on their own.
Is apple a monopoly? Probably not, because you can also switch to android. Does Apple have a large enough share of the market to influence the market? Likely, which is why the EU has DSA and DMA now.