How do I add ads to AdMob
You should use a commercialized version of App Inventor like Thunkable. App Inventor 2 does not have that option. See https://community-appinventor-mit-edu.ezproxy.canberra.edu.au/search?q=monetize
I recommend Kodular for that
Also creator.kodular.io is where you can create, like in ai2.appinventor.mit.edu