How to think about imperative nested navigation in flutter

Question

As I've been reading through the flutter documentation, I've noticed this warning spread throughout multiple pages of documentation for Navigation

Note: We don't recommend using named routes for most applications. For more information, see the Limitations section below.

Which makes sense to me, however I have yet to find any existing documentation / cookbooks that use this updated design to show how to support nested navigation without named routes. I have my app set up with a NavigationBar that calls the home page of where it's navigated to, and then that home page manages it's own navigation.

Here's an idea of what I want to accomplish:

Scaffold(
  bottomNavigationBar: NavigationBar(
    destinations: const <Widget> [
      NavigationDestination(
        selectedIcon: Icon(Icons.home),
        icon: Icon(Icons.home_outlined),
        label: 'Home',
      )
    ]
    body: const <Widget> [Home()]
)
....

class Home extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Navigator(...)
  }
}

...
// Some widget under "Home" with a child that has a button:
onTap: () => Navigator.of(context).push(
          MaterialPageRoute(builder: (context) => const RequestDashboard())
        ),

With the idea being, navigation would be containerized to whatever area it is located. However, I'm having trouble figuring out how to setup a nested navigation without using named routes. Or, if I'm even thinking about it in a way that best utilizes how Flutter works. If this can be cleanly implemented without named routes / declarative routing, I would prefer that. If not, I'm open to whatever will work :)

As a side note - One area in particular I've struggled with Navigator is getting the back button to work consistently within nested navigation. This is likely just a me issue being new to Flutter, though! Below is an example I've tried:

Navigator(
      pages: const [
        MaterialPage(
          key: ValueKey('Home'),
          child: Home(),
        ),
      ],
      onPopPage: (route, result) {
        if (!route.didPop(result)) {
          return false;
        }
        return true;
      },
    );