This is a variation of disp = posts (List of Posts / Items) where we are no longer on the most recent or the first page of the posts list but rather on page 2, 3, 4, etc.
Default Container and Widgets
Below is the default main Container and Widgets of this $disp_detail that comes with b2evolution. Yours may look different depending on the particular skin in use and the widgets currently installed and how they are configured.
Tip: We can fully customize how this disp variation will look by creating or replacing the
_posts.disp.php file in the currently used skin’s folder.