Why can't the weather be displayed on Apple mobile phone?

If the setting method is incorrect, the weather of Apple's mobile phone will not be displayed. The normal operation method is as follows:

Tool: iPhone 8

Operating system: iOS 14.4. 1.

1. Take Apple 8 as an example, and open the "Weather" app that comes with Apple's mobile phone.

2. Open the menu in the lower right corner and enter the Add City interface, as shown in the figure below:

3. Click the plus sign to add a city to know the weather, as shown in the figure below:

4. Enter the city name in the search box, and then select the city you want in the city candidate words that appear, as shown in the following figure:

5. You can see that the newly selected city already exists in the city interface, as shown in the following figure:

6, click on the city, so that you can adjust the specific weather forecast of the city, as shown in the figure below: