Popup element not available in search

Hello, if I search for the popup element, no result comes up.

Instead, if I want to create a popup I have to create a button > Link > After click > Popup > Create popup.

But after that, and all the set up the popup, doesnt shows up when I click on the button.

I dont know if it is related to the absence of the element in the search.

Thank you for your help.

Gautier