If she is getting quality sleep, she should be waking up alert. If she is not getting quality sleep, there is often a tendency to snooze. Fatigue is often an indicator of less than quality sleep. Excessive snooze sleep disrupts the sleep mechanism so proper sleep is harder to achieve. There are two things she could try. A fit bit and/or a recording pulse oximeter (better choice). Google recording pulse ox. They are affordable.

When I was getting lousy sleep, I could sleep 14 hours a day and still feel fatigued. Now that I know how to get quality sleep, I never need more than 8 hours unless I have been stressed.

What Asian supplements is she taking ? Some can be counter to her needs.