Marry, yes you can do a partial order refund. You can refund the entire order or an individual product with a single click.
To refund a single product, navigate to ORDERS and select the desired order. There is product quantity circle overlaying the product image. - Clicking it will refund one item.
You can refund as many items from your order as needed by just clicking the quantity icon that is overlaying the product image.
Steve - eez.io support