SwiftUI ColorPicker onAppear/onDisappear

Hi all,

Is there a way to be notified when the SwiftUI ColorPicker presents and/or dismisses its popover?

The standard .onAppear() and .onDisappear() on the ColorPicker() get called when the BUTTON for the colorpicker is presented, rather than when the popover is presented.

ColorPicker("Mine", selection: $colorValue)
   .onAppear(perform: {
      // Do something when the popover is presented
   })
   .onDisappear(perform: {
      // Do something when the popover is dismissed
   })

The .onAppear() and .onDisappear() in this code get called when the ColorPicker BUTTON appears, which is not what I'm wanting.

I'm using the .onAppear() and .onDisappear() with the standard .popover(isPresented: ...) view modifier to begin/end undo grouping elsewhere in my View which works well.

Button(...)
   .popover(isPresented: $showWidthSlider) {
      HStack(spacing: 0) {
         ...
      }
	    .onAppear(perform: {
         self.model.beginUndoGrouping()
      })
      .onDisappear(perform: {
         self.model.endUndoGrouping()
      })

I'm relatively new to SwiftUI so I'm hoping I'm just missing something obvious.

Cheers!