Using Ebaysdk the AddItem function seems to work but no item appearing on the sandbox after code being ran

Question

I am working on the ebay api currently using python and the ebaysdk. I have got all the keys etc correct in my .yaml and when I run the code it seems to function. Includes all the necessary xml output and stating success, thus going even further so that if I redo it it states an error about violating duplicate listing policy. However even though it should be functioning when I go to the sandbox I see no product listing and thus have no idea of it worked or not. Anyone with experience know what is happening?

from ebaysdk.trading import Connection

    
api = Connection(config_file=r'C:\Users\nwals\Documents\Code\NJProject\ebaysdk-python\ebay.yaml', domain="api.sandbox.ebay.com", debug=True)
request = {
"Item": {
            "Title": "Magic Keyboard",
            "Country": "GB",
            "Location": "UK",
            "Site": "UK",
            "ConditionID": "1000",
            "PaymentMethods": "PayPal",
            "PayPalEmailAddress": "nobody@gmail.com",
            "PrimaryCategory": {"CategoryID": "33963"},
            "Description": "A really nice mechanical keyboard!",
            "ListingDuration": "Days_10",
            "StartPrice": "150",
            "Currency": "USD",
            "ReturnPolicy": {
                "ReturnsAcceptedOption": "ReturnsNotAccepted",
            },
            "ShippingDetails": {
                "ShippingServiceOptions": {
                    "FreeShipping": "True",
                    "ShippingService": "USPSMedia"
                }
            },
            "DispatchTimeMax": "3",
             "ItemSpecifics": { 
                "NameValueList": [ 
                    {"Name": "Brand", "Value": "The ocean"}, 
                    {"Name": "MPN", "Value": ""}, 
                    {"Name": "Type", "Value": "Top-Loading"} 
                    ]
                } 
        }
    }

api.execute("AddItem", request)