although the sub menus work well using developer tools , the submenus do not work on actual devices, when you click on the mobile menu, it goes directly to the page.
I am on iPhone X, iOS 13 . but this problem is universal, navigate http://dental.owl-themes.net/ from a mobile device, click on the mobile menu icon, click on any of the links with sub menus. should the click take you to the page or show the sub menus?