What are the Shariah rulings for a woman on the day she concludes her postpartum waiting period (iddah after childbirth), and is it permissible for her to use things that were forbidden to her during the iddah, such as kohl and the like?

The 'iddah (waiting period) of a pregnant woman ends with childbirth. Adornment is only forbidden for a woman observing 'iddah during her waiting period. Once the 'iddah is over, it is permissible for her to adorn herself with kohl and other forms of beautification.