You said, if apps in admob are banned from advertising, will it be affected? The app I want to use for advertising is banned from advertising.
If admob disapproved or reject your app you will not able to show ads. Try with different application.
If I have an app in admob but the file is missing, can I make a new one and change the package name to be the same as the old one, then upload it to the play store? Is that okay?