GetOffers endpoint not returning active listings shown in Sellers Hub.

[listabl]

1. There's a sellers account with active listings, in EBAY_UK marketplace, but I don't get any of these offers returned from the API when using getOffers endpoint, only offers created using the API are returned. Moreover, offers created using the API don't appear under Listings tab in the Sellers Hub. When calling getOffers, query parameter sku (the custom label of the item in offer in the Sellers Hub) is added and I also tried specifying and not specifying marketplace_id. I am sure the access token used in the request belongs to the same account I am accessing it's Seller Hub. 
URL: https://api.ebay.com/sell/inventory/v1/offer?sku=4059623082425

2. When I create an inventory_item using the API (createOrReplaceInventoryItem endpoint), the item is created by default in EBAY_US marketplace. I want it to be created in EBAY_UK marketplace but can't find any body fields or request headers that could do so. 
URL: https://api.ebay.com/sell/inventory/v1/inventory_item/8596063536423

[bluedeltaweb]

Did you ever get anywhere with this? Specifically why offers created via the API don’t appear in the sell hub.

[yhve1212]

I am also facing the same issue, It has been a couple of days, and I still need help. Have you all found a solution?