Had a look at the records of Australia's batters, since the start of the Test Championship in 2023 (to end of yesterday's play)
Khawaja - 14 matches, 967 runs @ 37, 1 hundred
Labuschagne - 14 matches, 725 runs @ 28, 1 hundred
Smith - 14 matches, 983 runs @ 37, 2 hundreds
Head - 14 matches, 823 runs @ 33, 2 hundreds
Marsh - 12 matches, 797 runs @ 47, 2 hundreds
Carey - 14 matches, 671 runs @ 32, 0 hundreds
Green - 8 matches, 436 runs @ 34, 1 hundred
In addition:
New Zealand series (2024) - 1 hundred (Green)
West Indies series (2023/24) - 1 hundred (Head)
Pakistan series (2023/24) - 1 hundred (Warner)
England series (2023) - 4 hundreds (Marsh, Khawaja, Smith, Labuschagne)
India - Test Championship (2023) - 2 hundreds (Head, Smith)
Doesn't make for great reading!