It can be removed by changing the theme.

First, open the mobile phone desktop that needs to be set, find the settings button on the mobile phone desktop, and click to open it.

Find the Apps and Notifications option in the list of open apps, and then click to open it.

Find the notification management option in the list of apps that open subsequently, and then click to open it.

Find the music option in the list of apps that will open next, and then click to open it.

In the opened music settings interface, find the icon corner option at the bottom. It is on by default. Turn it off here. In this way, there will no longer be a number displayed on the upper right side of the music APP icon. .