Why doesn't the main screen display a red dot when WeChat receives new information?

This is because the corner mark setting of WeChat is not enabled. Take the Android phone as an example, the specific operation steps for setting the corner mark are as follows:

1. First open the settings in your phone, and then find the "Application and Notification" option on the page, as shown in the figure below. ?

2. Secondly, open the application and notification, and then in the pop-up window, find the "notification management" option, as shown in the figure below.

3. Next, open the notification management, and then find the "WeChat" option in the list, as shown in the figure below.

4. Finally, open WeChat, find the icon corner at the bottom, and open the button at the back, as shown in the figure below.