Smooth page scrolls followed by triggered images/media with parallax effect.
Demo: https://codecanyon.net/item/smooth-scrolling-for-elementor/53009356
Smooth Scroll plugin will make your WordPress site cool by making the scroll movement of the mouse wheel smooth.
Demo: https://codecanyon.net/item/smooth-scroll-scroll-site-without-jerky-and-clunky-effects-wordpress-version/19782948
This Simple and Powerful WordPress Plugin will help to make Scrolling on your site really Smooth.
Demo: https://codecanyon.net/item/smoother-smooth-scrolling-for-wordpress/23921342