“On Click” Popup
You can trigger a popup by clicking on any content element on your page:
Activate a popup template globally, for separate post types or for separate post (see description above)
Set the popup trigger to “On Click”
Copy the ID shown in “Use this unique ID to trigger popup” input

Add some content element to your page, for example a button
Paste the copied ID in CSS ID filed of the content element
WPBackery:
Elementor: