Hey, diona54.
I appears that, after setting up your new iPhone 7 Plus, you're not able to play music from the Music application on your iPhone as your music doesn't appear. You've tried to sync your music through iTunes on your computer, but it's not being transferred. You're also a member of Apple Music and I'm happy to help.
Turn on iCloud Music Library -- As a subscriber to Apple Music, iCloud Music Library will automatically sync your songs and playlists. Tap Settings > Music and make sure "Show Apple Music" and "iCloud Music Library" are turned on.
Make sure that you're signed in to all of your devices with the Apple ID that you use for your Apple Music subscription. Then follow these steps to turn on iCloud Music Library.
On your iPhone, iPad, or iPod touch
- Go to Settings > Music, and tap iCloud Music Library to turn it on.
- If you already have music on your device, you're asked if you want to keep the music that's on your device.
If you choose Keep Music*, the music from your device adds to your iCloud Music Library.
If you choose Delete & Replace, the music on your device is replaced with the content from your iCloud Music Library.
Let me know how that goes.
Take care!
