How did the ios15 notification bar become the original one?

system: IOS15.2.1

taking iPhone13 as an example, the notification bar of ios15 can be set by entering the notification. Divided into two steps, The specific steps are as follows: 1 Enter the setting notification option <: ! -1 Step 1: Enter the setting notification option -->

open the phone settings icon and click the notification options column.

2 Set the application display preview <: ! -2 Step 2 Set the application display preview -->

Click to enter the page, and select Apply to set and display the preview.