Using Divi's Portability Feature, we can easily export and import Theme Customizer settings from one website to be used on a different website without having to redo the same settings that were already done.
Export Theme Customizer Settings
Go to Appearance → Customizer or to Divi → Theme Customizer
From the top bar, click on the two arrow icon
Choose the Export Tab
Give the Export file a name
Click on the Download Export Button
The browser will prompt you to choose a location on your local computer where the JSON file containing all the Theme Customizer settings should be saved.
Pro Tip: Using the Divi's Portability feature, we can also export:
Theme Options settings
Divi Library items
A page layout
Theme Builder template