Hey @Samsung_whELBky, I hope you're doing well.
I'm sorry to hear about the loss of the music widget in Spotify. This is something that Spotify themselves removed and unfortunately can't be brought back via any troubleshooting from this community.
Here is an article I read with more information on this matter: https://www.androidpolice.com/2019/08/13/spotify-kills-the-widget-in-its-android-app-but-you-can-vot...
I hope this helps!