Shadows can be added to your scene once a project location has been set. Shadows use the project location to determine accurate sun position for a set date and time.
Editing shadows
Shadow visibility can be toggled by clicking the eye icon in the Shadows section of the View tab in the right sidebar.
Use the date and time sliders to set the day and time that you would like to see shadows for.
Note that you'll need to Save view updates for shadow settings changes to persist in the view.