If you want to fix the location not found error in the Find My app in your iOS device then you can try these solutions:-
Turn off the airplane mode in case it is on in any of the devices.
Make sure that the device has a good internet connection.
Charge the device if it is running out of battery.
Check the date and time settings.
Turn on the location services if it is turned off.
Read More At:- https://techzeel.net/what-does-no-location-found-mean/