Thanks for using our theme.
Enable Elementor for static blocks – https://gyazo.com/c44ec88c0bf24793ba441ffb5b5201c6 , Theme Options > General > Theme Menu Options > On.
Then you will be able to create a static block with the desired menu structure and select it to show for the desired menu item.
Let us know if you need any further assistance. In that case, provide temporary wp-admin access.
