BackButton Control, installs as modifier .backButton()

BackButton

import Foundation
import SwiftUI

struct BackButton: View {
    var dismissAction: () -> Void
    
    var btnBack : some View { Button(action: {
            self.dismissAction()
        }) {
           HStack {
               Image(systemName: "chevron.left.circle")
               .aspectRatio(contentMode: .fit)
               .foregroundColor(.black)
               Text("Back")
           }.padding(10).overlay{
               
           }
           //.border(.bar, width: 2)
           .foregroundColor(.black)
        }
    }
    var body: some View {
        VStack {
            AnyView {
                btnBack
            }
        }
    }

}
struct NavigationBack: ViewModifier {
    @Environment(\.presentationMode) var presentationMode: Binding<PresentationMode>
    
    func body(content: Content) -> some View {
        content
            .navigationBarBackButtonHidden(true)
            .navigationBarItems(leading: BackButton(dismissAction: {
                self.presentationMode.wrappedValue.dismiss()
            }).btnBack)
    }
}

extension View {
    // install on view with .backButton()
    func backButton() -> some View {
        modifier(NavigationBack())
    }
}

Your page view container should have .backButton() ie. ScrollView { content }.backButton()