Convert UIView animate to CAKeyframeAnimation in swift

I'm working on a Swift animation and I'm currently trying to refactor the animation code since my I'm trying to use the CAkeyframeAnimation but now I struggle with how to convert UIView animate method to CAKeyframeAnimation.

This is the one using UIView animate function.

    class myCustomView: UIView {

    func showPointOfInterest(at point: CGPoint, hideViewAfterAnimation: Bool) {

        if isPreviousAnimationPresenting() { layer.removeAllAnimations() }
    
        center = point
        transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
        self.alpha = 1
    
        UIView.animate(withDuration: 0.3, delay: 0, options: [.curveEaseInOut]) {
            self.transform = CGAffineTransform(scaleX: 0.9, y: 0.9)
        } completion: { animated in
            if !animated {
                return
            } else {
                UIView.animate(withDuration: 0.1, delay: 0, options: [.curveEaseInOut]) {
                    self.transform = .identity
                } completion: { animated in
                    if !animated {
                        return
                    } else {
                        UIView.animate(withDuration: 1.5, delay: 0, options: [.curveEaseInOut]) {
                            self.alpha = 0.5
                        } completion: { animated in
                            if !animated {
                                return
                            } else {
                                UIView.animate(withDuration: 0.5, delay: 0, options: [.curveEaseInOut]) {
                                    self.alpha = hideViewAfterAnimation ? 0 : 0.5
                                }
                            }
                        }
                    }
                }
            }
        }
    }
 

Generally, these are the things I struggled with...

1. I'm not sure what is the keyPath is gonna be. In my UIView animate function, I change the transform and alpha value. I saw examples put string for the keyPath, like CAKeyframeAnimation(keyPath: "position.x"), so what should I put for my keyPath?

2. Since I want to change the size of the view by using CGAffineTransform in the UIView animate function, do I put CGAffineTransform(scaleX:, y: ) in the transformKeyframeAnimation.values?

    func showPointOfInterest(at point: CGPoint, hideViewAfterAnimation: Bool) {
   
        if isPreviousAnimationPresenting() { layer.removeAllAnimations() }
   
        center = point
        transform = CGAffineTransform(scaleX: 1.5, y: 1.5)
        alpha = 1
   
        let transformKeyframeAnimation = CAKeyframeAnimation(keyPath: "transform")
        transformKeyframeAnimation.values = [CGAffineTransform(scaleX: 0.9, y: 0.9), CGAffineTransform(scaleX: 1, y: 1)]
        transformKeyframeAnimation.duration = 1.0
        transformKeyframeAnimation.isRemovedOnCompletion = hideViewAfterAnimation
   
   
        self.layer.add(transformKeyframeAnimation, forKey: "transform")
    }