You can create a message for the device that says it is lost and how to contact you.
For an iPhone, iPad, iPod touch, Mac and Apple Watch, your device does not display alerts or play a sound when you receive messages or notifications, or if any alarms go off. Your device can still receive phone calls and FaceTime calls.
For an iPhone, iPad, iPod touch and Apple Watch, you see your device’s current location on the map, as well as any changes in its location.
For applicable devices, payment cards and other services are suspended
In Find Devices on iCloud.com, select the device in the All Devices list on the left.
Click Lost Mode, click Stop Lost Mode, then click Stop Lost Mode again