Yes, I’ve done this several times when buyers have come back after an order has been closed. You might want to make a point of saying something like:
Please find attached your amended order. Also, please note that I understand that you may have not had time to check your order after delivery. However, please note that further revisions will necessitate contacting me for a custom quote, as I do not offer unlimited revisions".
This prevents buyers from having grounds to go to CS and complain that work you delivered to them is in any way incomplete.