No Alert Notifications from few Apps. How to Enable.
Certain Apps are not built for alert notifications. We are not discussing this here.
Let us look at the apps which are not providing alert notifications and how to enable Notification on those Apps.
For example here I have taken Amazon Music. GIF will take you through step by step process on enabling Notifications.
Do not delete these Apps as you risk of losing data you may have created while using the App.
Use notifications on your iPhone, iPad, and iPod touch - Apple Support