There is no such thing. The respective app stores allow you to distribute apps in select regions. This is an important feature for app stores because an app may not be a good experience in all countries. The app may not be localized to all languages, there may not be content moderators for those languages, those countries have a multitude of laws that you need to comply with, your app may include copyrighted content which is only licensed to be distributed it certain countries, etc..
>preventing screenshots from DRM content
This is a feature requested app developers due to the legal requirements when licensing content such as movies. Movie studios don't want people streaming or recording their movies so app platforms need a way to surely show this content.