I am not joking, nowhere on my iPhone 7 running iOS 13 is the Apple Music app. It took me a while to notice because I never use it, but I went looking tonight and it isn't there.
You probably deleted it by accident. Can’t you just re download the app from the App Store?
[doublepost=1564034385][/doublepost]I wonder if maybe it was offloaded since you said you never used it. Can first party apps be offloaded?