使用flutter，如何稍后将提供者添加到应用程序中？

dependencies:
  flutter:
    sdk: flutter
  provider: ^5.0.0

import 'package:provider/provider.dart';

class MyModel extends ChangeNotifier {
  int _count = 0;

  int get count => _count;

  void increment() {
    _count++;
    notifyListeners();
  }
}

void main() {
  runApp(
    ChangeNotifierProvider(
      create: (context) => MyModel(),
      child: MyApp(),
    ),
  );
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My App'),
      ),
      body: Center(
        child: Consumer<MyModel>(
          builder: (context, myModel, child) {
            return Text(
              'Count: ${myModel.count}',
              style: TextStyle(fontSize: 24),
            );
          },
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: () {
          Provider.of<MyModel>(context, listen: false).increment();
        },
        child: Icon(Icons.add),
      ),
    );
  }
}