How to Duplicate a Page
To duplicate a page either click the quick access link on the Manage Pages section or on the left side admin panel titled Pages
Select Add New from the top link or from the left side admin panel to start the new page.
Creating a name for the page and then select the button Use Divi Builder.
Select Clone Existing Page form the page creation options.
Now select the page you wish you duplicate from your websites list of active pages. The new page will load as an exact duplicate of the page you selected and will be ready to edit.