GDA2020 in QGIS
QGIS users can consume Department of Resources imagery services in GDA2020 by changing the Coordinate Reference System (CRS) to one of the GDA2020 options. Please note however that you need to set the CRS in three places in QGIS in order to have all layers in your Project align correctly.
In the Properties in the Project menu choose the CRS you need your layers to be projected in.
When adding a WMS, WMTS or WCS service layer to the Project, Change the CRS