The "Show seconds in system tray clock" option does not show for me. I have Windows 11 Pro, version 23H2, OS build 22631.4317. Do you know why this could be happening?
In Windows 11 24H2 and later versions, the “Show seconds in system tray clock” option has been moved to Settings -> Time and Language -> Date and Time -> Show time and date in the System tray dropdown.
You can direct access the page by right-clicking on the system tray clock and selecting “Adjust date and time” option from the context menu.