Dear Marcio,
Greetings of the day
Please note that the system notification is asking for the permission which is configured in the app and certificates.
While generating the iOS app certificate, if you don't select the push notifications capabilities for your app, this notification will not come.
Inconsideration of your settings need for iOS, I noticed that the value UNNotificationSetting is accepting Int as per this Apple Developer Website post.
Kindly try with 0 or "0" and check whether its working or still the same.
Let us know your thoughts.
Regards,
Palak Patel