It should be that the application has no notification permission, so it needs to open the application permission in the notification center.

The specific operation of starting application message push is as follows:

Find "Settings" in your mobile phone, click "Enter" and find "Notification Management".

Click to enter "Notification Management", where there are two items: "Notification Management" and "Floating Window Management", and "Notification Management" is displayed.

Find the application with permission to open in the notification management, and click Enter to display the corresponding options. Just choose Prompt or Allow.