The edge of Ukraine to Moscow should be something like 450 - 500 miles.

Quadcopters we’ve been seeing on the news aren’t anywhere near efficient enough to make it that far much less carrying a payload. Off the shelf dragon link uhf would only give them vision for about 27 mi.

Commercial fixed wing planes could carry a little more and go a little further.

If they’ve managed to get their hands on some proper military drones They could get there at low altitude with almost enough range to get back.