It's most likely a bug from a recent update rather than a permanent removal, try clearing the app cache or restarting your phone first, and if that doesn't work just update the app and it should come back.
If Google Maps media controls were removed, it usually means the feature was disabled or moved after an update in Google Maps. Try checking Settings → Navigation → Show media playback controls in the app. If the option isn’t there, the feature may no longer be supported in the latest version or depends on your device and region.
Google Maps media controls may disappear due to app updates, Android Auto settings, notification permissions, or background playback restrictions. Google occasionally changes the interface during feature rollouts. Updating the app, enabling media playback controls in settings, clearing cache, or restarting the device often restores Spotify or YouTube Music controls within navigation mode.
