Newbie Swift Question ... Lists and Views ???

Hi , I am new to SwiftUI and Mac/iOS concepts so am on a very steep learning curve.

If this is not the correct forum for this please let me know and I will delete and post elsewhere ...

Basically I am doing a favor for a friend and writing a simple data collection app for his iPad in Swift... it consists of a quite long list list of items to select from, each of which will have several possible values. Clicking on a "Change" button next to each item will bring up a list of possible values to choose from. So ....

The code works except that the list is displayed as an "icon" and has to be clicked to display the items to choose from ...

**How do I get the list to display automatically when instanced without having to click on the List icon ? **

Code: I have a list view which is called as the result of a button press:

Button(action: {
                        isShowingList=true

When the View is refreshed (State variable) results in the Selectable List view as follows:

struct TechReportView: View {
        @State private var isShowingList = false
        var body: some View {
        
          if isShowingList { // display a selectable list 
            SelectableListView(selectedItem: $selectedItem,
                               isShowingList: $isShowingList,
                               items: $copyList,
                                )
        }
        else
        { // show list of items and current values}

The List View is as follows

struct SelectableListView: View {
    @Binding var selectedItem: String?
    @Binding var isShowingList: Bool
    @Binding var items : [String]
    var key : String
    @Binding var toChange : String
    
    
    var body: some View {
        VStack()
        {
            NavigationView {
                List(items, id: \.self) { item in
                    HStack {
                        Text(item)
                        Spacer()
                        if item == selectedItem {
                            Image(systemName: "checkmark")
                                .foregroundColor(.blue)
                        }
                    }
                    .contentShape(Rectangle())
                    .onTapGesture {
                        selectedItem = item
                        toChange = item
                        isShowingList = false
                        setSKeyData(key, selectedItem!)
                    }
                }
                .navigationTitle("Select Item")
                .navigationBarItems(trailing: Button("Cancel") {
                    isShowingList = false
                })
            }
        }
    }
}