Restricted app not showing in other countries app store anyhow, To See, Download and then install on Other countries iDevice, we must have US account (Apple ID with USA address). Two different Apple ID work at the same time for iCloud (iOS Settings App) and App Store app, simultaneously. Find the general question and solution that you are
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Cannot Connect to App Store in iOS 12.4/iOS 14/13.5.1 on
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Welcome to the Apple Developer Program. Apple.com. Copyright © 2020 Apple Inc. All rights reserved. How to login to app store - Apple Community Apr 28, 2011 How to Use the iPhone App Store (with Pictures) - wikiHow Jun 04, 2020 Can't Connect to App Store on iPhone and iPad? - iGeeksBlog Jul 10, 2020