App for Salla Platform

I want to develop a website as an app for Salla (Salla is a platform for eCommerce like Shopify) This is the app store for Salla https://apps.salla.sa/en/

The app to create your own Whatsapp message templates using variables and send them manually. For Abandon Cart Recovery, COD, Welcoming message and Order Confirmation

This idea of the app looks like this app in Shopify
https://apps.shopify.com/whatsapp-chat-button

Please see this https://docs.salla.dev/