When starting a new game with the start date of 5/8/2024 in Australia, all player season 2023/24 season history is missing.
In my example save game, I have started a new Real World game taking control of Australia. All players have not had their 2023/24 season simulated and it skips straight from 2022/23 to 2024/25
I have only tried starting a new Real World game so far.