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
Step 4 - Use Elementor to drag or drop element to create header.
Elementor Layout setting
Front end look like :
Step 5 - Navigate to : Apperance > Customize > Header.‌
Choose your header for page.
If you want to know more, please click on "How to create Header by Elementor" to know about that.