A. If songs are missing after an update, first check if they are still in the app by navigating to the music library. If they are not there, try restarting the app. If that doesn't work, uninstall and reinstall the app to see if the songs reappear. Make sure to back up your music files before doing this.

B. If songs are still missing, check your device's storage settings to ensure that the files are not hidden or moved to a different location. You can also check if the songs are available in your cloud storage if you had previously synced them.