missing apple music
i got an iphone 8 to replace my old 6s. i recently reset my apple ID password and once i did, and i signed in on my new phone and everything on my account came back on my new phone; everything but all my playlists and music that i downloaded through the apple music app. everything in my library is gone except the few songs that i purchased years ago before i got apple music. but i had over 700 songs on this account!! how can i get them back??? what do i need to do?
iPhone 8, iOS 13