We’re seemingly about 18m away (2021-07-01) from having a new band (928-935) available, low-power and duty cycle but also presumably a lot less noise. Word doc here, see Appendix B
IOT Alliance (Australia) said in 2016 it’s 25mW EIRP and 1% Duty Cycle. I think that works for otherwise very competitive environments (at AU915/AS923), I saw some comment that 933-935 might be more restricted, I think the cellular providers were worried about interference.
That band would be pretty unconflicted and provide yet more choice in the .AU marketplace. It’d also fracture coverage further, if TTN supports it, but I’d be interested in thoughts on that. We’re already fairly well off in Australia so perhaps it’d be better to leave it to other IoT networks?