This post by @chriscoyier is the most generous case (to Apple) regarding the boot that Cupertino has been stamping on the web's face for a decade.
https://chriscoyier.net/2023/01/16/chokepoint/
What Chris identifies as "no incentive" to allowing alternative browsers is indistinguishable in practice from late-stage monopoly: when you've extinguished competition and reconfigured the world assuming it doesn't exist, it sure looks like a lot of work to allow it.