Please Help, Unity advertisements work on iPhones but not on Androids even though I use the same script and the same exact settings

I created a quiz game in unity and I implemented advertisements using the scripts from the unity website however the ads shows on iPhones but do not show on android

after that I wanted to create another application with mostly the same UI and canvases, so I just copied the project, deleted the scripts from it and I only kept the advertisement scripts, after I finished I realized that the new project shows advertisement in Android

I tried to compare both the projects and I have exactly the same settings on both of them so what could be the issue ?

sorry for the picture but I cannot upload more than what attachment as a new user

To resolve the issue of Unity ads not showing on Android, ensure that your ad unit IDs, platform-specific settings, and necessary permissions in the Android manifest are correct.

Verify that the correct SDK versions are used, test on real devices, and check logs for errors. Confirm ad unit settings in the Unity Ads dashboard and ensure proper initialization code execution for Android.