Mavic Air 2 maximum distance is only 6km if purchased outside of US?

[MAvic_South_Oz]

If all the large commercial aircraft have transponders and all the drones do as well

The ADS-B in DJI drones (Air 2) will only receive, the pilot should be able to see (or get a warning of ?) an aircraft approaching, but the aircraft won't see the drone, nor any ATC nearby.
I suppose if all drones were visible to ATC and manned aircraft, it'd be pretty cluttered sometimes.

Not sure but I think drone warnings (or visible ADS-B aircraft) will have to be able to be filtered to below a certain altitude, say less than 500' . . . no use telling a drone pilot there's an aircraft at 5000' (unless he's being a very naughty drone pilot !).