That’s precisely the source of the Chair’s frustration with the witnesses from Airservices.
I think the Chair was peeved when the committee realised the flight NEVER entered Australian airspace, that ASA actually NEVER communicated with the aircraft. The committee didn't realise that the flight went from Nandi's airspace to Auckland's airspace.
ATSB report should have covered the FIS issue and made a Safety Recommendation to close the loop is one existed.
However, this is pretty clear
ATS Communications Facilities
FIS Auckland SP6 INTL HF 13261 17904 3467 5643 8867 WI SELCAL
So NZ AIP infers that they do not provide ATS service (including FIS) at YSNF, AUS AIP (ERSA) says FIS provided by Auckland.