Hi,
Currently this is not possible I’m afraid. WordPress uses a single results page, which is invoked when the “s” query argument is sent in the header, and then the theme handles the rest.
Currently, all the search does is redirect to the custom page – but I very highly doubt the override can be triggered there – the divi archive will simply show the default contents. The override triggers whenever the search query argument is present, and then wordpress automatically shows the default results page.
At the moment only some Elementor pro widgets are supported to be used as a custom page as results page. We may implement integration to other modules as well later on.