I needed to hide a Section when an ACF field was empty, so I made a basic add-on for Elementor that hides Sections. The plugin is called Display Conditions For Elementor and is free of charge to download.
In order to get started with it I have made a short video demonstrating how you can use it to hide/show Section depending on whether the site visitor i signed/logged in or not. I also show how you can hide/show a Section depending on how old an post is.