Hi,
My name is Angel. I am an Independent Advisor. Thank you for posting in Microsoft Community.
On December 1, 2018, the Groove Music iOS and Android apps were retired. Your personal music files will continue to be available in OneDrive. You can keep listening to those files, and your playlists, with the Windows 10 Groove Music apps on PC, Xbox, or Windows Phone.
Groove Music on iOS and Android: FAQ:
https://support.microsoft.com/en-ie/help/413137...
Hope the information provided is useful. If the issue persists, reply here and we will be glad to help you.
Angel.