When you buy or sell an investment, there’s a standard delay between the trade being executed and when the ownership and cash are officially transferred. This is the settlement period.
For IDPS accounts, these use a Cash Management Account (CMA) for settlements. You may see the cash from a sale reported in your CMA before the investment holding is officially removed from your portfolio.
For Super, Pension, and Investment Accumulator accounts, these use a central Wrap Cash Hub/Account. Your entire portfolio balance, including cash and investments, is updated together after the trade has fully settled.