Yes you can create new or update existing items into your sales channels such as eBay, Amazon, Shopify from Selro
Depending on the demand for that marketplace or e-commerce store, we will add the required integration. However, if there is no strong demand, you can opt-in to our customer integration where you can pay a small fixed fee to get the integration added into your account. Also if you have a developer, you can also use our API to implement the integration