As per SOP and integration flow, user has to create new products or update the existing products from SelluSeller. In exceptional cases, if product is created or updated directly on seller center it needs to be manually synced to SelluSeller.
To manually sync the product,
Step1: Go to Integration> Ecommerce Channels
Step2: Click on Actions(3 Vertical Dot)>Sync Product
Upon performing the above steps the products will get sync to SelluSeller.
We hope the details above were helpful for you. Please feel free to share with us if require further assistance and will be happy to take it up.