Hello
Sorry to hear that..
The device location would only work if these conditions are met:
- You had Find My Device turned on prior to this.
- The computer will be turned on and connected to the internet.
In most cases, unfortunately, they are being wiped / clean installed when stolen. In that case, there's no way it can be located.
Sorry, I know this can be hard to hear, but I do want to give you the correct information.