Cellular data is not available for iOS app

We've released our app on the App Store and are facing the following issue: Some users are unable to connect to the server with the app, and the "Cellular Data" settings for our app are missing in the system settings. The app is developer on Qt framework (qt.io)

This is how it should be

This is what some users reporting - app unable to make requests to the server by https (request timeout)

Why it happening? Any tips how to fix?

Replies

Are you in touch with some of these affected users? Do you think it’d be feasible for you to send them a TestFlight build?

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Quinn “The Eskimo!” @ Developer Technical Support @ Apple
let myEmail = "eskimo" + "1" + "@" + "apple.com"