Go to SEO > PRO > Google News tab and activate the green toggle.
Check Enable Google News Sitemap.
Enter your publication name (must be the same as used in Google News).
Then select your custom post type you want to include in your XML News sitemap (eg: post).
Click the Flush your permalinks button.
Clear your cache if you have one.
Finally, click View your sitemap button.
Submit it to Google News by following carefully this official guide.
Note that we respect the rules of Google News: only articles published during the previous two days, and, to a limit of 1000 articles, are visible in the sitemap.