All my music on the Apple Music app has disappeared

Get help with iCloud Music Library - Apple Support

If you can’t see iCloud Music Library on your iPhone, iPad, or iPod touch

First, restart your iOS device. 

If you still can't see it after the restart:

1. Turn off iCloud Music Library and then turn it back on.

2. Sign out of the iTunes Store and then sign back in.

Verify first that your subscription is still active:

View, change, or cancel your subscriptions - Apple Support

if it is, then follow these steps:

Turn iCloud Music Library off, then on again

On your iPhone, iPad, or iPod touch:

1. 1. Go to Settings > Music, then tap iCloud Music Library to turn it off.
   2. Close Settings.
   3. Go to Settings > Music, then tap iCloud Music Library to turn it on.
   4. Turn on “Show Apple Music

 If they still don’t load:

1. in settings- iTunes App Store - your name - sign out- then sign back  in - you will need to turn iCloud music library back on again.