So, now it's about the user's data. Not sure whether it's because of Ads Mediation I'm trying to implement or it's been always there and only now Apple decided that they need to kick in.
Here is what apple's told me:
Dear Developer,
We identified one or more issues with a recent delivery for your app, "Headless D" 2.9.0 (3). Your delivery was successful, but you may wish to correct the following issues in your next delivery:
ITMS-90683: Missing Purpose String in Info.plist - Your app's code references one or more APIs that access sensitive user data. The app's Info.plist file should contain a NSLocationWhenInUseUsageDescription key with a user-facing purpose string explaining clearly and completely why your app needs the data. Starting Spring 2019, all apps submitted to the App Store that access user data are required to include a purpose string. If you're using external libraries or SDKs, they may reference APIs that require a purpose string. While your app might not use these APIs, a purpose string is still required. You can contact the developer of the library or SDK and request they release a version of their code that doesn't contain the APIs. Learn more (https://developer.apple.com/documentation/uikit/core_app/protecting_the_user_s_privacy).
After you’ve corrected the issues, you can use Xcode or Application Loader to upload a new binary to App Store Connect.
Best regards,
The App Store Team
