Hi,
Thank you for the proper details, it helps me a lot!
It was happening, because on the search instance options the index table was not enabled, and this post type was not actually selected. I have selected it for you via the back-end access: https://i.imgur.com/BPliqHP.png
You should be seein the news results now 🙂
Related documentations
– ​Generating the index table​
– ​​Enabling index table engine​
– ​​Index table FAQ​
I hope this helps!