Hello bunnie49,
Thank you for using Apple Support Communities. Content may not be available for a variety of reasons. If a song isn't available in Apple Music, you might still be able to purchase the song in the iTunes Store. You can always see which songs and artists are available in your region by using the following link here: Market with Apple Music
Using the link we shared, you can search for an artists and select your region. If they don't populate, this means they are not currently available in your region. If you'd like to make a request for the content to be added to the Apple Music catalog, you can do so here: Feedback - Apple Music - Apple
We hope this helps out. Thank you for using Apple Support Communities. Take care.