Using shortcode and popup

What demo?

From your site https://webberzone.com/plugins/better-search/

Are you hitting the search icon on my site? If so, that’s actually not my plugin. It’s a theme feature. I use Neve currently.

Better Search will hook into your theme’s search feature and then modify the default WordPress results.

OK, thank,
I using OceanWP with Elementor free and using “Premium Addons for Elementor” mega menu, so I don’t use the WordPress menu.
I want to show search icon that opens popup with search box.

You’ll need to check with OceanWP and/or Elementor on how to display this as it isn’t part of the plugin.

Thanks for the help