Locate Family members’ devices using the Find My app
When you join a Family Sharing group, you can help other family members locate their Mac computers, iOS and iPadOS devices, Apple Watch, AirPods, and Beats products by using the Find My app.
To locate your family’s devices:
Mac computers must have Find My Mac selected in the iCloud pane of Apple ID preferences.
iOS and iPadOS devices must have the Find My option turned on.
Apple Watch must have watchOS 3 or later.
By default, you can see the location of the devices for each family member. If someone has stopped sharing, they must turn sharing back on for you to locate a device. See Stop sharing your location with others in your Family Sharing group.