Flutter: How to set value in Country Pickers DropDown libraries

I have problem with setting value of country_code_picker and country_state_city_picker libraries. I try to set value in edit options, that i have choosed before when created new ad, but it doesn't work. Maybe someone has experience working with them, or have some suggestion what i need to do.

Data in Firestore. Contry code value is empty for some reason

How this problem looks in the app, how you can see data in these pickers doesn't set

Code when New ad creates

 String countryvalue = '';
  String countrycode = '';
  String cityvalue = '';
  String statevalue = '';

  // Adding new ad
  Future newAdd() async{
    return ads.add({
      'title' : titlecontroller.text,
      'location': '$countryvalue,$cityvalue',
      'currency' : currentcurreny,
      'country' : countryvalue,
      'countrycode' : countrycode,
      'city' : cityvalue,
      'state' : statevalue,
      'phone' : phonecontroller.text,
      'price' : pricecontroller.text,
      'desc'  : desccontroller.text,
      'url1'  : widget.url,
      'url2'  : widget.url2,
      'url3'  : widget.url3,
      'category'  : categoryCurrentItem,
      'userid'  : user != null? user!.uid : googleUser!.id,
      'time'   : Timestamp.now()
    });

  }


  //  Using country_code_picker library
       CountryCodePicker(
       initialSelection: 'EN',
       onChanged: (CountryCode country){
       setState(() {
       countrycode = country.dialCode!;
        });
            },
               )

  // Using country_state_city_picker library
  SelectState(
  onCountryChanged: (String value) {
  setState(() {
  countryvalue = value;
   });
       },
  onCityChanged: (String value) {
  cityvalue = value;
   },
  onStateChanged: (String value) {
  setState(() {
  statevalue = value;
   });
     })

Code when Edit and try to set saved data

 String? country;
  String? city;
  String? state;
  String? countrycode;


   //  Using country_code_picker library
   CountryCodePicker(
   initialSelection: widget.countrycode,
   onChanged: (CountryCode country){
   setState(() {
   widget.countrycode = country.dialCode!;
        });
            },
                )
   // Using country_state_city_picker library
   SelectState(
    onCountryChanged: (String value) {
    setState(() {
    widget.country = value;
          });
              },  
    onCityChanged: (String value) {
      setState(() {
      widget.city = value;
           });

              },
    onStateChanged: (String value) {
      setState(() {
      widget.state = value;
            });
            },)