That is called a "News Block." It can be enabled/disabled from within
Control Panel > Portal > News Body Image (News Block). It is the modern news format on portals and blogs. With the setting disabled, the portal is displayed as classic format.
News Body Image (News Block)
When enabled, this will search the news item until it finds the first image. If that image is larger than 240x240, it will display it as a "News Block" with the post text to the right of it. Text is truncated to 400 characters. All line breaks and HTML are stripped. If no image is found, the news item is displayed normally.
It was introduced in UBB.threads 7.7.2 (2019-07-02)
https://www.ubbcentral.com/changelog.php#772
