Will a menstruating woman who is unable to fast on the Day of 'Arafah due to menstruation receive the reward for fasting this day, which atones for sins of two years?

As long as you are keen on fasting the aforementioned days, including the day of Arafah, and an impediment to fasting, such as menstruation, occurs to you, then you will have the reward for this good intention, and you are like one who has observed the said fast. Fasting the nine days of Dhul-Hijjah carries a great and desirable reward.