I'm trying to get some paths for screens and followed the official document

But it requires routes setup instead of onGenerateRoute which is my current implementation?

return MaterialApp(
          title: Localized.brand,
          scrollBehavior: MaterialScrollBehavior().copyWith(
            dragDevices: {
              PointerDeviceKind.mouse,
              PointerDeviceKind.touch,
            },
          ),
          // routes: {}, << Url strategy expects this
          onGenerateRoute: AppRouter.setupRouting, // I'm using this
          theme: ThemeData(
            colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
            useMaterial3: true,
          ),
          home: const RootScreen(),
        )

Is there any way to achieve same with onGenerateRoute?