How to use a Dynamic Item Page in the Site Menu Dropdown

Hey Wix community, I am still learning how to use Wix and have a specific task I cannot complete. I have a collection that I have created a dynamic item page from. The dynamic item page is used for 4 different pages. My goal is to have these 4 pages become available to users through a dropdown box upon clicking on a topic in the site menu. I know that I can create subpages one-by-one, but I would like to use the dynamic page template I already have. I would love to hear some suggestions!