How to restore the blacklist to WeChat?

Wechat restore was hacked by friends as follows:

Tools: iPhone 1 1, iOS 15, WeChat version 6.7.4.

1. Open WeChat and click "Settings".

2. Click the Privacy option.

3, you can see the "address book blacklist" (these are our friends who joined the blacklist).

4. Find your account in it, and then click on the friend information, that is, "..." is in the upper right corner.

5. Just turn off the "Add Blacklist" option button, and you can restore the blacked-out friends on WeChat.