Windows 10 Find My Device allows you to find the approximate location of your device if this option is enabled.  To turn this feature on or off, select Settings > Update & Security > Find My Device.

To lock a missing Windows 10 computer or phone, log into account.microsoft.com/devices with your Windows account.  Select Find my Device, then click the Lock button.

Microsoft recommends removing devices that you no longer own or use from your Windows account.