Greetings Mlcoll,
IT sounds as though your'e attempting to create a slideshow in Photos on your iPad. To confirm, when attempting to add the playlist to the slideshow, have you confirmed all the songs are downloaded to the iPad? If not, the songs would need to be downloaded in order for them to be available to play in the slideshow. You can find the steps for downloading your purchases in Music below and in the following article.
- "Open the iTunes Store app.
- On your iPhone or iPod touch: At the bottom of your screen, tap More
, then tap Purchased. - On your iPad: Tap Purchased.
2.Tap Music. If you use Family Sharing, tap a family member’s name to see music that they purchased.
3.Find the music that you want to redownload, then tap it.
4.Tap the download button next to a song or album."
Redownload music
Let us know how that goes!