You can have the Sticky Header feature for your site with the Zakra Pro Add-On.
- Navigate to Appearance > Customize > Header & Navigation > Sticky Header from your WordPress Dashboard.
- Choose the section you want it to be sticky like Top Bar, Main Header, Full Header
- Click on Publish.
It is shown in the image below.
|| If you want to make a sticky header for specific pages. Refer to this article: ** How to enable Sticky Header for a specific page? (Pro)**