You can now add sticky sections and columns in Elementor, too!
You only need to add the grve-sticky-element CSS class under Section > Advanced > CSS Classes or Column > Advanced > CSS Classes, depending on whether you need to make the whole section or just one column sticky.
You can see the above example effect on the Intro Page created with Elementor.
Note that this feature will not work with the new Flexbox Containers of Elementor.