Transfer music from old to new iPhone
How do I transfer my iTunes purchased music from my old iPhone to my new iPhone?
iPhone XR
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If the music is still in the store, on the new phone : Redownload apps, music, movies, TV shows, and books from the App Store, iTunes Store, and Apple Books - Apple Support
Or copy it from the old phone to your computer's iTunes library (File > Devices > Transfer Purchases), and select and sync it to the new phone