Why can't OPPOR 17 receive WeChat messages and incoming videos after the screen is locked?

OPPOR 17 can't receive WeChat messages and incoming videos after the screen is locked because it doesn't have permission to open notification management. You can turn on permissions by the following steps:

1. Open the phone and find "Settings" in the phone:

2. Open Settings and find "Applications and Notifications":

3. Open the application and notification, and find "Notification Management":

4. Open notification management and find "WeChat" in the list:

5. Click to enter the WeChat management page, open the switch button on the right of "Allow Notification", and then find "Other Notifications":

6. Open other notifications and find "Screen Lock Notification" in the page. At this time, the monitor is not turned on. Then click Open and select "Display" in the pop-up window to open the screen lock notification function of WeChat: