describe with your target application. in settings. we can block many application's background data usage. better to share your appreciation with screenshot.
problem is to allow only few apps to access mobile data and Restrict other apps accessing cellular data even when they are opened .But option is only stop Background data access only!
sir there are two different ways to control background data. for this setting you need to go in data settings. where you can select data usage secondly you can use tag data management
