fix: route back button

lib/features/auth/registration/view/submission_data/submission_parent.dart

@@ -66,18 +66,32 @@ class _SubmissionParentState extends State<SubmissionParent> {
     return ChangeNotifierProvider(
         create: (context) => SubmissionDataViewModel(),
         builder: (context, child) {
-          return WillPopScope(
-            onWillPop: () async {
+          return PopScope(
+            canPop: false,
+            onPopInvoked: (didPop) async {
+              if (didPop) {
+                return;
+              }
               await routePush(context,
                   page: const BottomNavigationView(),
                   routeType: RouteType.pushReplace);
-              return false;
             },
             child: Consumer<SubmissionDataViewModel>(
                 builder: (context, provider, child) {
               return Scaffold(
                 appBar: CustomAppBar(
-                    height: SizeConfig.height * .1, title: 'Registration'),
+                  height: SizeConfig.height * .1,
+                  title: 'Registration',
+                  leading: BackButton(
+                    onPressed: () {
+                      routePush(
+                        context,
+                        page: const BottomNavigationView(),
+                        routeType: RouteType.pushReplace,
+                      );
+                    },
+                  ),
+                ),
                 body: Stack(
                   children: [
                     Column(