Divi Cart will install a separate plugin that shows an Ajax product search box on the top of shop and product category pages.

The plugin is installed and should show the search box on the pages.

If you get any issue with the plugin, simply de-activate and then activate it again.

The plugin can be further tweaked to show more fields and info in the Ajax search.

If you want to use the Ajax search box somewhere else on your page, simply use the shortcode as shown in the highlighted area below.