Step 1 - From admin Dashboard, navigate to Header Builder > Add New Header
Step 2 - Using Edit with Elementor then add element to your Header
Step 3 - Build your header style with unlimited layout
Front end look like :
Elementor Layout setting
Step 4 - Navigate to : Apperance > Customize > Header.
Choose your header for page.
If you want to know more about header, please click to : How to create Header by Elementor to know about it.