To enforce something like that you would have to force the drone to connect to some online database on a regular basis, and I don’t think that’s a thing. There’s certainly no requirement that drones only fly where there’s cellular or WiFi service.
I also know of at least one company using higher end DJI drones specifically for providing services to police & fire departments, so they’d have to have some way of opting them out of such geo locks.
DJI doesn’t track every one of the hundreds of thousands of drones they sell. And there’s no requirement that a drone even have an internet connection of anything like that.