Hi,
Thank you very much for the details, it helps us a lot.
You are looking for the more results feature, that will do the trick for the redirection under the results box.
The results page is a bit more complicated than that. The plugin can not and does not create a custom page for the results – it is a WordPress related limitation of archive pages and how they work. In your case the “Woocommerce results page” would be the optimal solution, but I am guessing you might not be using WooCommerce or have a theme that does not use that page. The custom URL is for cases, when the actual search results archive page is located elswhere (via custom mod_rewrite rules), and you want to adapt the search to that.
The upcoming release (v4.18) will include a new feature that supports custom results pages via Elementor Posts widget – that will offer a way to redirect the search results to any page that includes an elementor pro posts widget. That should be released within 3 days.