On my Phone
Turn off Find My iPhone on the device
Tap on Settings.
Tap on your name at the top.
Tap on Find My.
Tap on Find My iPhone.
Tap the arrow and then the toggle button. Type in your AppleID Password to turn the setting off.
Confirm that Find my Device is set to Off.
Your device is no longer associated with Find My iPhone. We are now able to send your device in for service.
Turn off Find My Device with iCloud.com
Visit iCloud.com then click on Sign In
Once you enter your AppleID and Password, you will then be prompted with a Two Factor Authentication code sent to your device.
Skip this and select “Find Devices”.
Any devices online will show this map. Move to step four to remove a device that is not online.
Click on the device you want that is offline, an offline device will not show an illuminated screen.
You should then see this screen. Sometimes it will show the last location seen, if it doesn’t do not panic, the steps are still the same.