Install the Groove music app on your iPhone or iOS device
1.Go to the App Store on your iPhone or other iOS device.
2.Select Search and enter Microsoft Groove.
3.Select Microsoft Groove, select Get, and then select Install. Note: If you previously installed Groove, select the cloud icon to install it again.
4.Enter your Apple ID and password.
Groove will begin to download. After the download is complete, the app will install automatically.
So, it appears the app is available for iOS. If it's not in your specific (UAE) regional store, then Microsoft forgot or intentionally decided not to make it available there for some reason. Not to bring politics or religion into the discussion, but I would wager that there are legal restrictions/hurdles in Islamic countries because of the objectionable western music.