The name below the application icon on the device is the display name of the package.
By default, the display name of the package matches the name of the package, but you can install it in Xcode by selecting the info.plist file and installing it in the editor.
The display name of the package does not have to match the name of the package or the name of the application that you installed in iTunes Connect, but it must match the name of the application that you specified in the store, otherwise Apple will reject the application.
In the App Store, recommendations :
3.4 Application names in iTunes Connect and displayed on the device should be the same so as not to cause confusion
Bundle documentation.
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