For an order to be recognized by GeekSeller as fulfilled and sent to Walmart or other marketplace, it has to be marked as Shipped in Shopify and has tracking number provided.
For example, this order below is not shipped:
Adding a tracking number as a note to the order does not make it shipped. You need to click on the CONTINUE button shown below:
Provide tracking information, then mark an order as shipped. Only then, GeekSeller is able to push this order to Walmart or another marketplace.