Because the article is only about the mentioned achievement. The project page of Wendelstein 7-X (https://www.ipp.mpg.de/w7x https://www.ipp.mpg.de/w7x) details

Because the article is only about the mentioned achievement. The project page of Wendelstein 7-X (https://www.ipp.mpg.de/w7x https://www.ipp.mpg.de/w7x) details what the project is about, though.