How do I fix the same layout of the Search filter module at the mobile/iPad?

-- url of the page with the problem -- : sobekbio.com
-- HikaShop version -- : 4.6.2
-- Joomla version -- : 4.2.4
-- PHP version -- : 7.4.9

I am working with Yootheme and Hikashop. I have made a module position in YT for the Search Filter module on the home-page. I have placed the filter-options to ALL = all of the fields. Its working perfect. I had some trouble to fix the lay-out, because I don't want the button "Filter" on my screen. Only the search field. Thats now OK on the desktop.

But when I go to mobile or standing Ipad I get not the same layout. There is a special mobile-navigation with the word "Filter". I want also the same layout as on the desktop. Only the simple field with "search". Is this a css problem? Can I fix this in the frontend.css or custom.css? Or do you have another idea for me?