They even have emulators now. Undoubtedly a change forced on them by the EU.
https://developer.apple.com/support/alternative-browser-engi...
But while your comparison is flawed, I agree with the assertion² that Apple should not be locking user choice like this. The EU agree too, hence Apple's immature little hissy fit nearly breaking their (already "not quite there") offline-first app support for EU users when they were told so.
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[1] Avoiding the word "monopoly" to pre-counter the sort of "well actually" responses I got about dictionary definitions last time I said something like this.
[2] Unless I'm reading you backwards and you are saying MS should have been able to like Apple currently do!
As for the EU, they have already forced Apple to allow third-party browser engines under the DMA, as well as are forcing Apple to show a "browser ballot" like they made Microsoft do.
Microsoft’s anti-trust lawsuit with the DOJ was 23 years ago. There are people working at Microsoft and Apple who weren’t even alive when that happened.
Times change.