Apple Music is now available on your Alexa/Echo devices. It's NOT an option for a default music service (see below for a listing).
You can see a listing of all entertainment services in
this post.
By selecting a default, Alexa will automatically use that service without you specifying the service name.
To set your Default Music Services in the Alexa app, go to:
Settings -->
Alexa Preferences -->
Music & Media -->
Account Settings -->
Choose default music services
Default Music Library- Amazon Music
- Spotify
- Pandora
Default Station Service- Amazon Music
- Pandora
- iHeartRadio