This Song Is Not Synced Across Your Devices

If apple music is still not syncing on your devices you need to make sure that you are using the same apple id on your devices that were used to buy the apple music subscription.
This song is not synced across your devices. If a song is grayed out then the song might be waiting to upload no longer available or not yet released from the apple music catalog. To play it here go to itunes and turn on icloud syncing. When tapped i get this song is not synced across your devices. When i delete the affected track and add it back the symbol and message reappear.
If an explicit song is grayed out you might have restrictions turned on for your device. Icloud music library lets you sync your entire music collection across multiple apple devices. I tried disabling sync library on my iphone and rebooting all devices. The song might not be available in your country or region and will appear in gray text when you search for it in apple music.
If you only want to sync your existing music library across all of your devices and not any music from the apple music catalog you can subscribe to itunes match on your computer. Ensure you use the same apple id. The icloud music library option is now enabled and you should be able to access your apple music across all of your devices. Itunes match lets you access your music library on any apple device or a pc with itunes for windows.
It works by matching the songs in your library to tracks available in the itunes music store allowing you to download or stream them from anywhere with an internet connection. If you buy music from the itunes store you can redownload your past music purchases on your apple device or a pc. If a song is missing make sure that all of your devices have sync library turned on and signed in with the same apple id.