As you may be aware, Google starts to use Firebase as analytics so I want to use it in my current project. I succesfully finished the implementation and upload project to iT
If you using Firebase, but don't using firebase push notifications, to avoid this warning you should disable app delegate swizzling. Just adding FirebaseAppDelegateProxyEnabled BOOL key with value NO to your Info.plist. And Your future release builds will be without any warnings about Push notifications.
Solution:
FirebaseAppDelegateProxyEnabled
and set it to NO
;Objective: While this issue does not mean that your app will be rejected, the email is sent to everyone who has access to the app record on App Store Connect. For corporate team accounts this usually means that management stuff gets this "We have discovered one or more issues" email. For them it usually means that development team does something wrong. Hence, I've been asked to get rid of it.
If the library that you're using has any calls to the push notification API and you don't have a provisioning profile/certificate that enables your app to receive push notifications then you will receive this email from Apple. However if you do not need to use push notifications in your app then you can ignore this email.
This email doesn't mean that your app will be rejected. I used to get this email all of the time when submitting games made with Unity and using a certain Prime31 plugin for native functionality, it also made use of the push notification API which caused me to receive this email.
You can ignore it, it will be fine.