Flutter - How to Reset Layout Page Drawer, After Change the page and get back

Question

I'm newbie with flutter

anyone can help me How to Reset Layout Page Drawer, After we Change the page and get back ?

this my code :

class DrawerItem {
  String title;
  IconData icon;
  DrawerItem(this.title, this.icon);
}

class Homepage extends StatefulWidget {
  Homepage({super.key});

  final drawerItems = [
    DrawerItem("Home", Icons.home),
    DrawerItem("1", Icons.military_tech),
    DrawerItem("2", Icons.paid),
    DrawerItem("3", Icons.account_circle),
    DrawerItem("4", Icons.volunteer_activism),
  ];

  @override
  State<Homepage> createState() => _HomepageState();
}

class _HomepageState extends State<Homepage> {
  int _selectedDrawerIndex = 0;

  _getDrawerItemWidget(int pos) {
    if (pos == 1) {
      return 1();
    } else if (pos == 2) {
      return 2();
    } else {
      return Text("Error");
    }
  }

  _onSelectItem(int index) {
    setState(() => _selectedDrawerIndex = index);
    Navigator.of(context).pop(); // close the drawer
  }

  @override
  Widget build(BuildContext context) {
    List<Widget> drawerOptions = [];
    for (var i = 0; i < widget.drawerItems.length; i++) {
      var d = widget.drawerItems[i];
      drawerOptions.add(ListTile(
        leading: Icon(d.icon),
        title: Text(d.title),
        selected: i == _selectedDrawerIndex,
        onTap: () => _onSelectItem(i),
      ));
    }

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.drawerItems[_selectedDrawerIndex].title),
      ),
      drawer: Drawer(
        child: ListView(
          padding: EdgeInsets.zero,
          children: <Widget>[
            SizedBox(
              height: 150,
              child: const DrawerHeader(
                decoration: BoxDecoration(color: Colors.blue),
                child: Text('Aplikasi Perhitungan',
                    style: TextStyle(color: Colors.white, fontSize: 24)),
              ),
            ),
            Column(children: drawerOptions)
          ],
        ),
      ),
      body: _getDrawerItemWidget(_selectedDrawerIndex),
    );
  }
}

in Page 1 I have Some input form, when I select the first form, another form will display, this the picture : Drawer menu

Picture 1

Picture 2

can anyone help me, how to reset the layout when I Use the Page 1, go to home page, and then go back to page 1, layout from picture 2 will back like picture 1

I'm already setstate in file page 1, but nothing happend