Flutter: BottomAppBar Navigation with FAB (by Andrea Bizzotto)
Flutter Case Study: Multiple Navigators with BottomNavigationBar (by Andrea Bizzotto)
Alternatively, check whether BottomAppBar can help with the routing and the page refresh:
https://stackoverflow.com/questions/54622602/how-to-use-a-bottomappbar-for-navigation-in-flutter
https://proandroiddev.com/flutter-how-to-using-bottomappbar-75d53426f5af
https://gist.github.com/HansMuller/0e76c54b1f2d4423efbdc2c185e761ef