Locate a family member’s missing device
When you’re in a Family Sharing group and family members share their locations with you, you can use Find My iPhone on your iOS device or on iCloud.com on a computer to help another family member find a lost device.
To get your help with locating a device, your family member must do the following on the device before it’s lost:
Turn on Location Services: Go to Settings > Privacy, then turn on Location Services.
Turn on Find My iPhone: Go to Settings > [your name] > iCloud, then turn on Find My iPhone.
Share their location with you: Go to Settings > [your name] > Share My Location, turn on Share My Location, tap your name, then tap Share My Location.
Open Find My iPhone on your device or on iCloud.com (on an iOS device or a computer).
Sign in with your Apple ID.
In the list of devices, select the one you want to find.
Your devices are at the top of the list, and your family members’ devices are below yours.
The selected device appears on a map so you can see where it is.
See Find My iPhone.