Ruben Gomez found a new Bing test where they are experimenting with showing a News card that expands and shows more news.
Searching in Bing for news related terms, in this test, would bring up a box/card, with an arrow at the bottom of the box that enables users to click to expand to show more news. At the bottom of the expanded version of the Bing News box, you will see a link to more news directing you to Bing News.
Here is a picture of the closed and expanded version:
Ruben created a video so you can see the user interface in action: