If you've recently updated your library from your laptop, and don't see changes in your mobile app, you might just need to wait a few minutes.
It takes time for your music to be synced from your laptop to the cloud, and then down to your mobile device. This usually takes just a few minutes, but could take up to an hour depending on the speed of your internet connection for your laptop, and also on your phone.
If you're still having trouble after an hour or so, please send us a message from the chat bubble or in the mobile app.