Here's a way to achieve a sticky horizontal scroll section within your Webflow site. Using CSS sticky and interactions you can now have a showcase section that horizontally scrolls on scroll down in Webflow.

A horizontal scrolling timeline of events driven by Webflow CMS. You can navigate through the timeline both vertically (below) and horizontally. Both lists stay in sync. The vertical section shows more notes and links regarding the timeline events. This timeline is CMS driven and there are two collections, one for the events and one for the categories of each events. Each year of the timeline is made out of one collection list. There is more info on how this works at the bottom of the page, specifically how the CMS and CSS calc work. This could be great for about pages, client timeline pages, and much more.