Search element that you used on that page is the Elementor – Header, Footer & Blocks plugin element, not XStore theme element. Unfortunately, it does not have option to search by brands, or show the categories select, or show the search results like products grid and we can do nothing with that because we can’t edit that plugin, we are not developers of that plugin. You may contact the plugin author to ask them to improve the search element and add the mentioned features for that if it searches the products.
We have only search form in header and it searches by product name, description, SKU and allows to enable product categories select to search in that category. We don’t have search by brand. We have only filter by brand widget that works on the shop archive pages.
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