Hi, i was wondering if you have some code that removes header-top on mobile devices and if its on purpose? It doesnt even show on your site ( https://demo.themegrill.com/flash/ ), so its not something wrong with my installation of the theme.
Though it was on purpose, we’re thinking about it. I’ll discuss with our development team about it. It may be available in next version of the theme.
For now, you can add this CSS in Additional CSS box of Customizer: