Hello Michael Koerner

Please use this JavaScript to Template Options -> Custom Code -> Custom JavaScript

jQuery(function($) {
    $(document).on("click", ".menu-deeper", function(event) {
        if (event.target.classList.contains('menu-toggler')) return;
        if (event.target.children.length) {
            event.preventDefault();
            event.stopPropagation();
            $(this)
                .toggleClass("menu-parent-open")
                .find(">.menu-child")
                .slideToggle(400);
        }
    });
});

This will allow the parent menu items to open child items while being clicked on titles. The rest customization is on your hand. Sorry, we do not provide customization support.

Best regards