Fair point, but we still need people (like Linux enthusiasts) in Australia to buy these phones and complain to the manufacturer to add support for any missing features needed for 000, and work with the carriers to whitelist the devices. If no one buys these devices in the first place and no one complains about it, Linux phone makers would have little incentive to resolve the issue.
Maybe the Aussie Linux users could get together and work together with Linux Australia[1] to act as an intermediary and work something out.
[1] https://linux.org.au/