Apple Music app
Although I subscribe to Apple Music, I’m unable to download the app to my phone. Whenever I want to listen to Apple Music on my phone I have to search for it to open it. Why isn’t the Music app on my screen like other apps?
See the 'Find and open an app in App Library' and 'Move an app from App Library to the Home Screen' sections in:
Find your apps in App Library on iPhone - Apple Support