They linked to the original story which has a link to the documents showing some of Voyager's features including the "active persona" or fake profiles. The user guide also has some of the other details they mention about mapping out friendships.
https://www.brennancenter.org/sites/default/files/2021-11/J9...
https://www.brennancenter.org/sites/default/files/2021-11/J9...