Flutter Bottomnavigation Not Visible

I am building an app with Flutter and I am currently trying to implement a bottomNavigationBar but currently it is not visible when I run the app. My first guess was it could be something to do with the Streambuilder that I have put in the home property of the build method in MyApp class

Here's my code:

import 'package:firebase_app_check/firebase_app_check.dart';  
import 'package:firebase_auth/firebase_auth.dart';  
import 'package:firebase_core/firebase_core.dart';  
import 'package:flutter/material.dart';  
import 'package:flutter_riverpod/flutter_riverpod.dart';  
import 'package:iinhouse/core/screens/create_account.dart';  
import 'package:iinhouse/core/screens/home.dart';  
import 'package:iinhouse/core/screens/loader.dart';  
import 'package:iinhouse/core/screens/login.dart';  
import 'package:iinhouse/core/screens/verify_email.dart';  
  
// Create new screens for the bottom navigation.  
class Screen1 extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return Center(child: Text('Screen 1'));  
  }  
}  
  
class Screen2 extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return Center(child: Text('Screen 2'));  
  }  
}  
  
class Screen3 extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return Center(child: Text('Screen 3'));  
  }  
}  
  
void main() async {  
  WidgetsFlutterBinding.ensureInitialized();  
  await Firebase.initializeApp();  
  await FirebaseAppCheck.instance.activate();  
  runApp(const ProviderScope(child: MyApp()));  
}  
  
class MyApp extends StatelessWidget {  
  const MyApp({super.key});  
  
  @override  
  Widget build(BuildContext context) {  
    return MaterialApp(  
      title: 'iinhouse',  
      theme: ThemeData(  
        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),  
        useMaterial3: true,  
      ),  
      routes: {  
        '/login': (context) => const Login(),  
        '/create_account': (context) => const CreateAccountPage(),  
        '/verify_email': (context) => const VerifyEmailScreen(),  
        '/home': (context) => HomeScreen()  
      },  
      initialRoute: '/login',  
      home: StreamBuilder(  
        stream: FirebaseAuth.instance.authStateChanges(),  
        builder: (context, snapshot) {  
          if (snapshot.connectionState == ConnectionState.waiting) {  
            return Loader();  
          }  
  
          if (snapshot.hasData) {  
            final user = snapshot.data;  
            if (user!.emailVerified) {  
              return MyHomePage(); // Use the new wrapper widget  
            } else {  
              return const VerifyEmailScreen();  
            }  
          }  
  
          return const Login();  
        },  
      ),  
    );  
  }  
}  
  
class MyHomePage extends StatefulWidget {  
  const MyHomePage({super.key});  
  
  @override  
  _MyHomePageState createState() => _MyHomePageState();  
}  
  
class _MyHomePageState extends State<MyHomePage> {  
  int _selectedIndex = 0;  
  
  final List<Widget> _screens = <Widget>[  
    HomeScreen(), // Ensure HomeScreen is const if possible  
    Screen2(),  
    Screen3(),  
  ];  
  
  void _onItemTapped(int index) {  
    setState(() {  
      _selectedIndex = index;  
    });  
  }  
  
  @override  
  Widget build(BuildContext context) {  
    return Scaffold(  
      body: _screens[_selectedIndex],  
      bottomNavigationBar: BottomNavigationBar(  
        type: BottomNavigationBarType.fixed,  
        items: const <BottomNavigationBarItem>[  
          BottomNavigationBarItem(  
            backgroundColor: Colors.white,  
            icon: Icon(  
              Icons.home,  
              color: Colors.black,  
            ),  
            label: 'Home',  
          ),  
          BottomNavigationBarItem(  
            icon: Icon(Icons.business),  
            label: 'Business',  
          ),  
          BottomNavigationBarItem(  
            icon: Icon(Icons.school),  
            label: 'School',  
          ),  
        ],  
        currentIndex: _selectedIndex,  
        selectedItemColor: Colors.deepPurple,  
        onTap: _onItemTapped,  
      ),  
    );  
  }  
}  
  
class HomeScreen extends StatelessWidget {  
  @override  
  Widget build(BuildContext context) {  
    return Scaffold(  
      body: Center(  
        child: Text('Home Screen'),  
      ),  
    );  
  }  
}