Flutter listview builder in building side menu and page data

Question

I recently implemented a listview builder with a sidemenu with 4 tabs in the menu. It was successfull showing the page title on each tab chosen, but when I try to add data to specific tabs it does not show and I can't understand what is missing from my code.

```
class _AppContainerState extends State<AppContainer> {
  final List<String> menuItems = ["Home", "Organization", "Settings", "Help"];
  final List<String> menuIcons = ["Icon_home", "Icon_organization", "Icon_settings", "Icon_help"];
  double xOffset = 60;
  double yOffset = 0;
  double pageScale = 1;
  bool sidebarOpen = false;
  int selectedMenuItem = 0;

  String pageTitle = "HomePage";

  void setSidebarState() {
    setState(() {
      xOffset = sidebarOpen ? 265 : 60;
      yOffset = sidebarOpen ? 70 : 0;
      pageScale = sidebarOpen ? 0.8 : 1;
    });
  }

  void setPageTitle() {
    switch (selectedMenuItem) {
      case 0:
        pageTitle = "HomePage";
        break;
      case 1:
        pageTitle = "OrganizationPage";
        break;
      case 2:
        pageTitle = "SettingsPage";
        break;
      case 3:
        pageTitle = "HelpPage";
        break;
    }
  }

 Expanded(
                    child: ListView.builder(
                  itemCount: menuItems.length,
                  itemBuilder: (context, index) => GestureDetector(
                    onTap: () {
                      sidebarOpen = false;
                      selectedMenuItem = index;
                      setSidebarState();
                      setPageTitle();
                    },
                    child: MenuItem(
                      itemIcon: menuIcons[index],
                      itemText: menuItems[index],
                      selected: selectedMenuItem,
                      position: index,
                    ),
                  ),
                    ),

                ),