I'm trying to expand the Datagrid when adding another value. Using Xamarin.Forms.Datagrid

Question

I'm using Xamarin.Forms.Datagrid. What I'm struggling with is displaying the second row. I suspect it is in the adding value part that I'm not specifying to add a new row to the Datagrid. But for the life of me I can't see it.

Now if I scanned a different barcode. It adds the new value to the collection but does not expand the datagrid.

My ObservableCollection:

public ObservableCollection<dgvProductionReceiptSource> ProductionReceiptSource { get; } = new ObservableCollection<dgvProductionReceiptSource>();

Where I get my data from:

private void FillDataGrid()
    {
        try
        {
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                connection.Open();

                using (SqlCommand command = new SqlCommand("SELECT DocNum, OWOR.ItemCode, ItemName, PlannedQty, CAST(OWOR.DueDate AS DATE) FROM OWOR " +
                    "INNER JOIN OITM ON OWOR.ItemCode = OITM.ItemCode WHERE Status = 'R' AND OWOR.DocNum = '" + ScanBarcodeText + "' ORDER BY DueDate ASC", connection))
                {
                    using (SqlDataReader reader = command.ExecuteReader())
                    {

                        if (reader != null)
                        {
                            while (reader.Read())
                            {
                                
                                ItemNum = reader.GetString(1);
                                Desc = reader.GetString(2);
                                PlannedQty = reader.GetDecimal(3);
                                DueDate = reader.GetDateTime(4);
                                ScanQty = 0;

                                if (DueDate == DateTime.Today)
                                {
                                    if (DocNum.ToString() == ScanBarcodeText)
                                    {
                                        AddQty();
                                    }
                                    
                                    if (DocNum.ToString() != ScanBarcodeText)
                                    {
                                        DocNum = reader.GetInt32(0);
                                        ProductionReceiptSource.Add(new dgvProductionReceiptSource()
                                        {
                                            DocNumProductionReceipt = DocNum,
                                            ItemNumberProductionReceipt = reader.GetString(1),
                                            DescriptionProductionReceipt = reader.GetString(2),
                                            PlannedQuantityProductionReceipt = reader.GetDecimal(3),
                                            ScannedQuantityProductionReceipt = 0
                                        });
                                        AddQty();
                                    }
                                }
                            }
                        }
                    }
                }
                connection.Close();
            }
            ScanBarcodeText = string.Empty;
        }
        catch(Exception ex)
        {
            Application.Current.MainPage.DisplayAlert("Alert", ex.Message, "OK");
        }
    }

Any help would be appreciated