Improve FluxStore Multivendor app home page speed and add loading animation to horizontal layout product cards

Hello guys. What we need is to improve home page screen speed of a fluxstore multivendor app. We want to load all horizontal layouts sequentially (as user scrolls down, it will load new horizontal layouts). Also we need some loading shimmer effect to product layouts.
Links to app:
Ios: https://apps.apple.com/ro/app/emve-marketplace/id6449289156?l=ro
Android: https://play.google.com/store/apps/details?id=com.axpgroup.emve&hl=ro