Stored passwords not visible on iOS' passwords page.

[juanfactor88]

Hi, I'm trying to save login information from my app to iOS keychain, this is what I implemented:

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: LoginPage(),
    );
  }
}

class LoginPage extends StatefulWidget {
  @override
  _LoginPageState createState() => _LoginPageState();
}

class _LoginPageState extends State<LoginPage> {
  final _storage = FlutterSecureStorage();
  final _userController = TextEditingController();
  final _passwordController = TextEditingController();

  Future<void> _saveCredentials() async {
    await FlutterKeychain.put(key: 'username', value: _userController.text);
    await FlutterKeychain.put(key: 'password', value: _passwordController.text);
    
  }

  Future<void> _loadCredentials() async {
    String? username = await FlutterKeychain.get(key: 'username');
    String? password = await FlutterKeychain.get(key: 'password');
    setState(() {
      _userController.text = username ?? '';
      _passwordController.text = password ?? '';
    });
  }

    void _clearCredentials() async {
   // await _storage.delete(key: 'username');
    //await _storage.delete(key: 'password');
    await FlutterKeychain.remove(key: 'username');
    await FlutterKeychain.remove(key: 'password');
    await FlutterKeychain.clear();
  }

  @override
  void initState() {
    super.initState();
    //_loadCredentials();
  }

  @override
  void dispose() {
    _userController.dispose();
    _passwordController.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('Login Page')),
      body: Padding(
        padding: const EdgeInsets.all(16.0),
        child: AutofillGroup(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              TextField(
                keyboardType: TextInputType.name,
                autofillHints: [AutofillHints.username],
                controller: _userController,
                decoration: InputDecoration(labelText: 'Username'),
              ),
              TextField(
                keyboardType: TextInputType.visiblePassword,
                autofillHints: [AutofillHints.password],
                controller: _passwordController,
                decoration: InputDecoration(labelText: 'Password'),
                obscureText: true,
              ),
              ElevatedButton(
                onPressed: _saveCredentials,
                child: Text('Save Credentials'),
              ),
              ElevatedButton(
                onPressed: _loadCredentials,
                child: Text('Load Credentials'),
              ),
              ElevatedButton(
                onPressed: _clearCredentials,
                child: Text('Clear Credentials'),
              ),
            ],
          ),
        ),
      ),
    );
  }

}

This works fine on Android as I get the OS prompt to save and retrieve the password, but on iOS there is no prompt and when I search for the saved credentials in settings -> passwords, they're not there, so I can't manage those credentials from the device, nor have them on the iCloud backup.

Do I need to configure something else?