PointerEnabledButton class demonstrating pointer support for iPadOS 13.4

PointerEnabledButton.swift

import UIKit

class PointerEnabledButton: UIButton {
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        if #available(iOSApplicationExtension 13.4, *) {
            enablePointer()
        }
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        if #available(iOSApplicationExtension 13.4, *) {
            enablePointer()
        }
    }
    
}

@available(iOSApplicationExtension 13.4, *)
extension PointerEnabledButton: UIPointerInteractionDelegate {
    
    func enablePointer() {
        self.addInteraction(UIPointerInteraction(delegate: self))
    }
    
    func pointerInteraction(_ interaction: UIPointerInteraction, regionFor request: UIPointerRegionRequest, defaultRegion: UIPointerRegion) -> UIPointerRegion? {
        return defaultRegion
    }
    
    func pointerInteraction(_ interaction: UIPointerInteraction, styleFor region: UIPointerRegion) -> UIPointerStyle? {
        return UIPointerStyle(effect: .automatic(.init(view: interaction.view!)))
    }
    
}

Agreed. I didn't catch that in my initial digging. Still useful as a framework if you want to do anything other than the default behavior.