How to set the software lock on Apple's mobile phone?

How to set the software lock on Apple mobile phone;

1. First, click the "Settings" button in the interface, as shown:

2. Click the "screen usage time" column, as shown:

3. Then click the "Set password for screen use time" option, as shown in the figure:

4. Click the "Apply Quota" option, and then select "Add Quota", as shown:

5. Select the software we want to lock in the following list, as shown:

6. Finally, set the locking time and click Add to complete the software locking.