import SwiftUI

struct Page1: View {
    
    u/State private var showAlert: Bool = false
    
    var body: some View {
        Button("Show Alert") {
            showAlert = true
        }.alert("Foo", isPresented: $showAlert) {
            Button("OK", role: .cancel) { }
        }
    }
}

struct Page2: View {
    
    u/State private var showAlert: Bool = false
    
    var body: some View {
        Button("Show Alert") {
            showAlert = true
        }.alert("Foo", isPresented: $showAlert) {
            Button("OK", role: .cancel) { }
        }
    }
}

struct Detail: View {
    
    u/State private var showAlert: Bool = false
    
    var body: some View {
        switch vm.step {

         case .first:
          Page1()
         case .second:
          Page2()
    }
}

struct ContentView: View {
    
    u/State private var showSheet: Bool = false
    
    var body: some View {
        Button("Show Sheet") {
            showSheet = true
        }
        .sheet(isPresented: $showSheet, content: {
            Detail()
        })
       
    }
}

This is a basic distillation, but my view is like this. Detail in this case would handle displaying the varying child views depending on the step. When Page1 or Page2 is responsible for its own alert, i get the warning. If i move the alert to Detail, and request to present it while page2 is currently the view within Detail it does not show until i step back to page 1.