use many pub in different page

covas_mobile/lib/classes/ad_helper.dart

@@ -2,37 +2,26 @@ import 'package:google_mobile_ads/google_mobile_ads.dart';
 import 'package:flutter_dotenv/flutter_dotenv.dart';
 
 class AdHelper {
-  static BannerAd? bannerAd;
-  static bool isBannerAdLoaded = false;
-
-  static Future<void> loadBannerAd(Function setStateCallback) async {
+  static Future<BannerAd> createBannerAd(Function setStateCallback) async {
     await dotenv.load(fileName: ".env");
     final adUnitId = dotenv.env['AD_UNIT_ID'] ?? '';
 
-    bannerAd = BannerAd(
-      adUnitId: adUnitId, // Replace with actual ID
+    BannerAd bannerAd = BannerAd(
+      adUnitId: adUnitId,
       size: AdSize.banner,
       request: AdRequest(),
       listener: BannerAdListener(
         onAdLoaded: (ad) {
-          setStateCallback(() {
-            isBannerAdLoaded = true;
-          });
+          setStateCallback(() {});
         },
         onAdFailedToLoad: (ad, error) {
           print('Banner Ad failed to load: $error');
-          isBannerAdLoaded = false;
           ad.dispose();
         },
       ),
     );
 
-    bannerAd?.load();
-  }
-
-  static void disposeAd() {
-    bannerAd?.dispose();
-    bannerAd = null;
-    isBannerAdLoaded = false;
+    bannerAd.load();
+    return bannerAd;
   }
 }