change theme style with out effecting on data

Hi mzinhom-abn,

Thanks for reaching to us.

You can create a dev site and import any template there, then with the help of the import functionality of Elementor you can export templates, more detail is here: https://elementor.com/help/template-library/

and you and export Theme Settings, Headers as well https://xtemos.com/docs-topic/theme-settings-backup/ https://xtemos.com/docs-topic/how-to-export-import-headers/

Devsite – also called a Staging platform where you can test issues, enable/disable features/plugins thus such changes will affect the main site. The below article will help you to create it:

https://www.wpbeginner.com/wp-tutorials/how-to-create-staging-environment-for-a-wordpress-site/

Regards,