I am trying to know if there are recent projects/ research on earth-based material for construction in Australia specifically, and what are the used methods (e.g. cob- adobe-rammed earth)
I am not sure about research specifically, but there is definitely construction happening - this is an ecovillage that I have been researching over the last couple of years, on the Central Coast of NSW, near Gosford. https://nararaecovillage.com/2020/12/natural-building-at-narara-ecovillage/ There are many different forms of construction being experimented with.