Some devices visiting my website default to the "desktop" version of my website. My desktop version has clickable drop down menus with sub-menu selections. The behavior is when you scroll over a title menu with a mouse cursor it reveals sub-menus as drop downs.
For example, on an iPad, I only can click the title menu item not revealing the sub-menu items. If I enable desktop breadcrumbs, It seems breadcrumbs doesn't show the sub-menu items either if on a menu title item.
Is there a way to click a menu on a mobile device so it reveals all sub-menus and then allow a user to click either title menu or the sub menus revealed?

Please help.

I didn't find the right solution from the Internet.

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