Creating an MKMapKit curved / spherical / interpolated camera transition - ios

Question

I would like to animate the camera so that the entire animation feels "curved" rather than "linear."
Right now, with the out-of-the-box camera animation iOS offers, or even when using UIView.animate(), the animation feels like the camera is directly moving from the start to the end. However, I would like the animation to feel like it is curving from the start to the end.
Here's a picture describing what it feels like now vs what I would like it to feel like.
Here is an example from Kakao maps, a Korean app, of what the desired animation would be:
Currently, I'm just using two camera animations, to create a flying-out and flying-in effect. When I create my own custom animations for MKMapView's camera with a curveEaseInOut, the speed of the animation is curvedEaseInOut, but this does not create the desired effect. This creates the undesirable "linear" feeling as depicted in the "What it's now:" diagram above
UIView.animate(withDuration: duration*2,
delay: 0,
options: .curveEaseIn,
animations: {
self.mapView.camera = preRotationCamera
}) { _ in
UIView.animate(withDuration: duration*2,
delay: 0.1,
options: .curveEaseOut,
animations: {
self.mapView.camera = finalCamera
}, completion: completion)
}
I image that using animateKeyframes(withDuration:delay:options:animations:completion:) could be a valid approach. However, I have not been able to successfully animate the MKMapView camera through a series of coordinates with animateKeyframes() — the keyframes seemed to be ignored, and the camera just directly transitions to the final camera.
For example, this code simply transitions the camera directly to finalCamera:
UIView.animateKeyframes(withDuration: duration*2, delay: 0, options: .calculationModeCubic, animations: {
UIView.addKeyframe(withRelativeStartTime: 0.0, relativeDuration: 0.5) {
self.mapView.camera = preRotationCamera
}
UIView.addKeyframe(withRelativeStartTime: 0.5, relativeDuration: 0.5) {
self.mapView.camera = finalCamera
}
})
How could one create this kind of spherical / interpolated / curved camera transition for iOS?
For reference, this is with iOS15 and Swift 5.