If you don't like it, change the wallpaper as follows:

1: First, click to open the "Settings" app on the iPhone home screen, as shown in the picture

2. In the Settings list, find the "Wallpaper and Brightness" option. In the Settings list, find the "Wallpaper & Brightness" option and click on it, as shown in the picture

3. Next, click on the picture below the wallpaper to select it, as shown in the picture

4. In the wallpaper selection option, you can choose Apple's built-in wallpaper, or you can also select a picture in the phone's photo album, as shown in the picture