Getting Infinite Scrolling to work, horizontal scrolling

o-0 Horizontally! I’m afraid the core plugin that’s used in the wordpress plugin:
https://github.com/paulirish/infinite-scroll
Doesn’t currently support horizontal scrolling and it’d take quite a lot of time to make it support it (its really designed for automatic vertical scrolling).

https://www.dynamicwp.net/articles-and-tutorials/20-beautiful-wordpress-slideshow-plugins/
https://www.geeksucks.com/showcases/12-awesome-wordpress-slideshow-plugins.htm

These might help (I know a lot of them are aimed at image slideshows, but some relate to content sliding).

Sorry I couldnt be of more help!