Google play has this warning under PolicyAd Content
We found ad SDKs in your app
Version: 6, SDK: AdMob
Version: 6, SDK: Facebook
If your app serves ads, you must answer 'Yes' to the question below. If you use ad SDKs but your app doesn't serve ads, you can leave your answer as 'No'.
I am not using Ads. Is expo injecting this code into my app? How do I resolve this?
The Expo SDK includes the Facebook and Admob SDKs, the same way it includes code for the camera, playing/recording audio, getting the phone’s location etc., etc.
This does not mean that your app will actually show adverts unless you make use of those features.
UPDATE: If you build with EAS Build then only the dependencies you actually install will be included in the app. So if you build with EAS Build and you do not install AdMob or Facebook SDKs etc., then your app will not include that code.