The RNAV Approach was designed by Airservices Procedure designers for QLD Emergency Services, who paid for the service. As such, the plate and updates are only provided to QES and Cairns Approach. They also paid for RNAV approaches to be designed for Mossman Hospital, Tully Hospital etc.
Bit like QANTAS paying Naverus to design the RNP approaches - these are limited distribution as well.