Right now one of the limits is just controlling that many let along sourcing it. Putting that many actively controlled drones in one area at once and you'll swamp the bandwidth.

The drones in Ukraine largely use miles-long spools of fiber optic cable, so while I agree that sourcing is a problem, bandwidth likely isn't. If you want to be creative there's probably a bunch of hybrid wireless/wired/semi-autonomous configurations that would allow for minimizing bandwidth requirements in practice, but it would still fall apart as soon as a reasonably powerful jammer is turned on.

They would just be autonomous. Setting a GPS (or alternate system) coordinate is pretty simple enough. Individual targets could just be AI controlled at this point, or 10 years in the future.