Yes, I was pretty surprised too because Australia is usually always included in all their rankings. They say:

This graphic ranks countries by average monthly earnings adjusted for purchasing power parity (PPP), using data from the International Labor Organization. Rather than comparing salaries on paper, the ranking measures how much goods and services workers can actually afford after accounting for local prices.

The results show that high nominal wages do not always translate into stronger purchasing power. In some countries, expensive housing and consumer costs significantly reduce how far incomes go, while others combine relatively high wages with lower living costs.