In the leaked ATC recording, the display is showing a collision alert before the impact. It just doesn't have any capability to do anything about them, it has t

In the leaked ATC recording, the display is showing a collision alert before the impact. It just doesn't have any capability to do anything about them, it has to rely on the air traffic controller to resolve the issue. You could argue that helicopters, being very nimble craft, should have ADS-B receivers and provide display and sound their own collision warnings to their pilots. That's perfectly possible, I just don't think it's mandated