To find Landscape, search for Landscape under the Modes Tab, and then under the Place Tab, the first icon to the left with a cube. Click on All Classes and scroll down until you find Landscape. You can also use the search bar to find Landscape.
The engine then redirects you to the tab in the middle with mountains, also called Landscape. After placing your Landscape in your level, specify your Landscape’s settings then click on create. I reset my position to the origin and made sure the scale is at a default of 10x10x10.