In the Family module, you can choose one primary guardian and one backup guardian to care for your children in the event you pass away. Guardian provisions will only come into effect if both parents pass away.
Our legal advisers recommended that we set the platform up this way because, if multiple guardians are appointed (e.g. a couple), and they get divorced, it can be very difficult to determine who should care for the children. For this reason, we have singular guardian selections.