post
https://marketplace.walmartapis.com/v3/feeds
Update fulfillment lag time for multiple items in a single feed. Lag time is the number of days between when an order is placed and when the item ships. A lag time of 2 days or more may require category-level approval; submit a lag time exception request if needed. Send a JSON or XML feed and set feedType=lagtime. For schema definitions and samples, download