You can add music to your Facebook profile and pin one you want to make visible on your Facebook bio.
To add music, open the Facebook app on your Android device, tap on your profile picture, scroll down and tap 'See your About Info', then scroll to the Music section and tap 'Add Music'. Search for the song or music you want to add and tap the song or the Add button.
To pin music, open the Facebook app on your Android device, tap on your profile picture, scroll down and tap 'See your About Info', then scroll to the Music section and tap the added music. Tap on the three dots beside the music name and select 'Pin to profile' option.
To delete a song, open the Facebook app on your device, tap on your profile picture, scroll down and tap 'See your About Info', then scroll to the Music section and tap the added music. Tap on the three dots beside the music name and select 'Delete song from the profile' option.