Hi elmahdy.work,
Thanks for reaching to us.
First of all, I’m really sorry have taken long time to reply you due to the weekend.
You can create a dev site and import any template there, then with the help of the import functionality of Elementor you can export HTML Blocks, more detail is here: https://elementor.com/help/template-library/
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/
Then, please read our documentation on how to import/export header: https://xtemos.com/docs-topic/how-to-export-import-headers/
Regards,
.
