Why is the product unlisted after it is added to Shopee & Lazada?
Newly added items on Shopee & Lazada will always be unlisted first as a safety precaution. This allows you to finalize any detail or make sure that the item is ready before you choose to publish it.
You can list it yourself by going to Shopee & Lazada Seller Center. Log in and go to the products page, you'll be able to select the products you want to list and click "Publish".