Logging your periods in the app will help you spot any patterns for how your cycle affects your energy.
The significant hormonal changes associated with menstruation can impact your blood glucose, but whether they do, in what way and by how much varies from woman to woman and even month to month.
Many women report having high blood glucose for a few days before their period starts. This is due to the changes in oestrogen and progesterone causing a temporary resistance to insulin (reducing your ability to efficiently manage carbohydrates).
However, this is not true for every woman. Being in Limbo will help improve your ability to process carbohydrates in the long term, as well as allowing you to see via your sensor how your body is coping day by day. Increasing protein intake and avoiding highly processed foods will help with keeping your blood glucose stable throughout your cycle.
As you're using Apple Health, it's also worth using the built-in cycle tracker so you can learn more about your body's patterns.