Quest 2: IAP.GetProductsBySKU(Skus) is returning empty

public readonly string[] Skus = { "CPTIER1", "CPTIER2", "CPTIER3", "CPTIER4" };
public void GetIapItems(Action successCallback, Action<string> failureCallback)
{
    string debugStr = "**** Oculus.GetIapItems: ";
    foreach (var sku in Skus)
    {
        debugStr += "\n" + sku;
    }
    Debug.Log(debugStr);

    IAP.GetProductsBySKU(Skus).OnComplete(msgProductList =>
    {
        if (msgProductList.IsError)
        {
            string errorMsg = msgProductList.GetError()?.Message ?? "Error getting products by sku";
            Debug.LogError("OculusGetIapItems: " + errorMsg);
            failureCallback?.Invoke(errorMsg);
            return;
        }
        
        OculusItems = msgProductList.GetProductList();
        
        debugStr = "**** msgProductList.GetProductList(): " + msgProductList.GetProductList().Count;
        foreach (var oculusItem in OculusItems)
        {
            debugStr += "\n" + oculusItem.Sku + " -- " + oculusItem.Name + " -- " + oculusItem.FormattedPrice;
        }
        Debug.Log(debugStr);
        
        successCallback?.Invoke();
    });
}