How can i call my provider model into initState method

i have several widgets use my provider as a condition , and i need one call to access my provider to whole widget from init state instead of wrapping every widget into my provider and it's consumer

this is my provider

class ProviderForFiltter extends ChangeNotifier {
  bool isFiltterrr = true ;

  bool get isFiltter => isFiltterrr;

  void changeStatus(bool status){
    isFiltterrr = status;
    notifyListeners();
  }
}

this is my main.dart

class Myproject extends StatefulWidget {
  const Myproject ({Key? key}) : super(key: key);

  @override
  _Myproject State createState() => _Myproject State();
}

class _Myproject State extends State<Myproject > {



  @override
  Widget build(BuildContext context) {
    return  
      
          Provider(
               create: (BuildContext context) {
                return ProviderForFiltter();
               },
               child: const MaterialApp(
                  debugShowCheckedModeBanner: false,

                  home: WelcomeScreen()


            ),
             ),

    );
  }
}

this is my Stful Widget

ProviderForFiltter? isF ;
 @override
  void initState() {
    super.initState();
     // i tried this but it always give me errors that is isF  null value
     WidgetsBinding.instance?.addPostFrameCallback((timeStamp) {
      isF = context.read<ProviderForFiltter>();
    }); 
       // also itried this but it don't work 
    isF = Provider.of<ProviderForFiltter>(context, listen: false);
  }

  @override
  Widget build(BuildContext context) {




    return Scaffold(
      body: Text('change'),
    )

  }

}

in the fact i need to use it's bool value as condition into Consumer and change it

i hope any help guys