iOS ads not working

Hello, I am trying to test my game on iOS through Xcode. Test ads worked fine on both the simulator and real device. But real ads don't show on a physical device (iPad Pro latest model) but work in the Xcode simulator. Any help is appreciated.

Usually it takes approx ten days after launch before the ads will show.

If they work in the simulator you are probably all good.

I tried submitting the build to app store connect and it got rejected because the watch ads button didn't do anything. Here's the message they sent me:

I'm not sure how the app can be published if they are saying that ads don't work and you're saying the ads show up 10 days after the game has been published.