Basic question - dice demo project - get all values / roll all

I'm sure this is a basic question, but I'm new to this style of development, so thought Id ask...

I've worked through Apple's dice roller demo, so far so good - I'm using the code below to render and roll a single die;

struct DieView: View { init(dieType: DieType) { self.dieValue = Int.random(in: 1...dieType.rawValue) self.dieType = dieType }

@State private var dieValue: Int
@State private var dieType: DieType

var body: some View {
    VStack {
        if self.dieType == DieType.D6 {
            Image(systemName: "die.face.\(dieValue)")
                .resizable()
                .frame(width: 100, height: 100)
                .padding()
        }
        else {
            Text("\(self.dieValue)")
                .font(.largeTitle)
        }
    }
    
    Button("Roll"){
        withAnimation{
            dieValue = Int.random(in: 1...dieType.rawValue)
        }
    }
    .buttonStyle(.bordered)

    Spacer()
}

}

Again, so far so good - works as I'd expect. I can now also add multiple DieViews to a DiceSetView and they display as I'd expect.

Where I'm stuck is in the DiceSetView, I want to both determine the total score across the dice, and also offer the ability to Roll All the dice in a set. (Ultimately I want another level above the set, so I'll be looking to roll all dice in all sets)

I can't simply call a func / method on the child view (i.e. iterate through them and sum their values, and roll each), I suspect I need to change how it's all structured, but not sure where to go from here...

Can anyone point me in the right direction?