I also face the same situation but the solution is in our hands.I have tried a website that also gives enought knowledge to face all this.https://doramaswow.me/
It sounds like a system conflict may be causing the issue with Spotify controls not appearing in the notification bar. Here are a few things you can try to resolve this:
Clear Spotify Cache: Go to your phone's settings > Apps > Spotify Premium APK > Storage > Clear Cache.
Check Notifications Settings: Ensure that Spotify has permission to show notifications. You can check this by going to Settings > Apps > Spotify > Notifications.
Reinstall Spotify: Sometimes reinstalling the app can solve these glitches. Uninstall and reinstall Spotify from the Play Store.
Safe Mode: Boot your phone in safe mode to see if a third-party app is causing the issue. If Spotify works in safe mode, it could indicate that another app is interfering.
Hopefully, one of these steps helps fix the issue!