WordPress Dropdown Menu Issue

Hello to WordPress experts,

This is Syed Ahsan a beginner WordPress user. I’m managing a WordPress website ‘doctor13.com’, and need help with the dropdown menu issue. There are many pages and subpages under my ‘Mega Menu’. When you hover the mouse over those menus that contain subpages it does not show those pages. Here is the link to the screen recording. https://www.awesomescreenshot.com/video/29324937?key=4a9fec697100d86019a1d876dde8aaec

Kindly help me out with this issue. If someone knows about coding, please tell me what is the code for that and where I need to put the code.

The page I need help with: [log in to see the link]