In this context it can be a "power" move to push away developers who are unwilling to agree to further closing of the platform. As a result Apple will have only "the faithful ones" and will avoid reactions like recent Unreal fiasco ( in this case the faithful one is Unity). And as I see its working perfectly, most of tech you-tubers are in the bag by default, most of the designers and creative users are lazy (and technically challenged), corporate users, semi pros and regular iPhone crowd are already locked in and don't care. The only thing is someone to start legislative reaction, but this is hard and Apple has all the money. So this is the new norm. Machiavellian move with global impact:)
Game developers are more than happy to deal with such platforms, and I confess it was more fun to target the Amiga, knowing what to count on, than the mess that the PC has been since forever.
That crowd can turn on to their Pandora, GPX, Arduino, Raspberry, whatever SOC is going trendy.
As for Unreal I wish they learn their lesson, or be honest and create a lawsuit against Sony, Nintendo and Microsoft.