FWIW, here's the ABC's report:
https://www.abc.net.au/news/2022-12-...rash/101716312
ATSB chief commissioner Angus Mitchell said it was a "long-established government policy" to prioritise resources on investigations with the potential to deliver the greatest public benefit.
Mr Mitchell said mid-air collisions were rare and any ATSB investigation would be "unlikely to yield new safety learnings for the aviation industry". He said there was "self-administration arrangements" for the recreational sector to undertake its own accident investigations. "Where requested and as resourcing permits the ATSB may assist sport and recreation aviation organisations," Mr Mitchell said. "The ATSB empathises with the next of kin who have lost loved ones in the Kybong accident and are seeking answers as to how the accident occurred."