I saw the screenshot you attached and visited the URL you provided. To make the footer like the default you need to Go to Appearance >> Widgets >> Footer column edit.
In the Retail demo the footer is created by means of an HTML Block that is displayed inside one column layout.
To make the columns default you need to edit the html “block footer retail” and from the each section you need to choose the layout as shown inside the screenshot: https://ibb.co/2gLX98Q
Or you can simply change the layout from Theme Settings >> Footer to 4 columns and create a new footer according to your requirements.