This is an example of the Grid Page template. The grid section is created automatically by the theme based on the child pages added to the Grid Page template. The content area, which comes from the parent theme, is shown below the page header and above the grid items. Unfortunately, it’s not possible to display a content below the grid.
This page has only two child pages. As a result, the grid is consisted of two grid items. You can add more child pages to fit your needs. The grid will have a two columns layout.