There is no limit for products on eCommerce stores. YOU can start with a few products and go up to an unlimited number of products. However, YOU have to consider the best hosting service for the database. If YOU have a reliable hosting service that can provide YOU with the required storage capacity, then YOU are good to go for thousands of products on your eCommerce store.
Generally, with increasing products, the site speed slows down. But YOU can improve it with our technical help, and we will remain available for YOU after the launch of your eCommerce website.