How can I pass data to multiple stateful pages in Flutter?

So, I'm trying to pass data from one page to multiple pages, but here's the catch: I only want to actually navigate to one of them. I'm using this code snippet to navigate to the next page:

     Navigator.push(
             context,
             MaterialPageRoute(
                 builder: (context) =>
                     TodayPage(lg_username: unameController.text)),).then((value) => _login(lg_username));

But now I need the lg_username data to be available in multiple other pages without actually navigating to them. Any thoughts on how I could achieve this?

Try this follow:

create file static_variable.dart

class StaticVariable {
  static UserModel? user;
  static String? userId;
}

save userId or user data to StaticVariable

ElevatedButton(
        child: const Text('Navigator'),
        onPressed: () {
          StaticVariable.userId = 'YOUR USER ID';
          Navigator.push(
            context,
            MaterialPageRoute(
                builder: (context) =>
                    TodayPage(lg_username: unameController.text)),);
        },
      )

Then, you can call StaticVariable in any file

Text(StaticVariable.userId ?? '')