If you find you need to duplicate your site’s Divi settings on to a different site there is a very easy way to do this.
Navigate to your Divi settings in the Admin area.
You will see a double arrow to the top right:
Click on this and a modal will appear with Import and Export options. Choose the Export option first to download your file to your local machine.
Then go to the new site’s Divi settings and click the double arrow to get the same dialogue box where this time you can click Import, find the file you just downloaded and run it.