Admob Question, Please help

Hi All,
I have an app built for iOS and Android, and want to put an Admob component in it. Do I really need to make another Adalo version for platform (say keep original for iOS and make another version for Android). Or I just simply just change the detail in Admob every time I build App for each platform? For example just change App ID and Ad ID for iOS when I build for an iOS, and change App ID and Ad ID for Android when I build for an Android?
The reason I am asking it because the App is already on both stores.

Thank you and hope to hearing from someone soon!