Magento 2 Infinite AJAX Scroll - Cyno Infotech
https://www.cynoinfotech.com/product/infinite-scroll-magento-2-extension/
The Magento 2 infinite scroll feature loads the product catalog without reloading the page. Your customers will be happy with the user-friendly navigation and good performance of your web store. Infinite Scroll Magento 2 extension helps customers to load product catalog automatically without reloading page or pagination. Automatically reduce product load times and improve customers' shopping experience by offering smarter and smoother navigation with this great AJAX plugin.