Will a woman be rewarded if she gives charity from money her husband gave her, and she does not work?

Your giving in charity of the amount is among the best acts of devotion through which you will attain full reward, if your intention is pure for Allah, because the money became your property after your husband gifted it to you. You are entitled to dispose of it in any lawful way you see fit. So, you will have the reward for your charity, and your husband will have the reward for gifting the money to you.