Need help in google ad manager app id

Anyone can help me regarding google ad manager, my app is already added in admob and is showing in admanager already but there was one problem is that "which app id i use in my app " . 1) Given by admob 2)No app id in admanager
Where is my admanager app id ??

Please help me :pleading_face::pleading_face: anyone from @Kodular

Anyone can help me ??