How does Apple's mobile phone view the phone number and information of blackmailers?

In the information filtering function, the viewing method is as follows:

Tool: iPhone 7

Operating system: iOS 14.4. 1.

1. First unlock the iphone6S and find the settings in the system: ios 13.6.

2. Then find the information option in the settings, as shown in the figure below.

3. Then find the information filtering option in the information interface, as shown in the figure below.

4. Finally, in the information filtering interface, find the filtered information, and click Enter to view the blocked messages.