Preview panel is missing in Dynamic page!!!

I created a dynamic page for my data collection. But the preview panel is not showing anywhere on the page as demonstrated in the Wix video here: - YouTube

You need to have items in your live Database for this to show, can you confirm you have this?

yes this is my data collection

@deleteduser In the video she was working with her sandbox datacollection, and tested it in a Preview mode in the entire video. When she clicked the data collection of courses to create the dynamic page, she receives two items: the dataset icon and the preview panel. From my end, I only see the dataset icon, and the preview panel is nowhere seen. See the screenshot from the video