Earlier quoted context omitted.
A big part of what makes Australia a better performing economy is maintaining high population growth rate of 1.5%, mostly through immigration. Has had implications on housing affordability, but it's great for GDP statistics. https://www.macrotrends.net/global-metrics/countries/aus/aus...
Per capita GDP is falling with every new migrant. I don't think it's the kind of GDP growth anyone wants to have.
GDP per capita is mostly static since a large increase pre-COVID during the explosive China growth years 2005-2020.
Most variations since are exchange rate variations more than actual changes in GPD vs population (GDP is usually denominated in USD)[1],[2]
Low GPD per capita is definitely NOT correlated with high migration, which decreased in the years GPD per population decreased[3]
If anything low migration is inversely correlated with higher GDP over the last 25 years: high immigration is correlated with higher GPD per capita - but I don't think one should draw a causal link here: the cause of GDP growth in AUstralia is generally accepted as increased raw material exports to China, and that has led to higher employment.
[1] https://data.worldbank.org/indicator/NY.GDP.PCAP.CD?location...
[2] https://tradingeconomics.com/australia/gdp-per-capita
[3] https://www.macrotrends.net/global-metrics/countries/aus/aus...