Windows Latest reports that, despite initial hopes that the missing taskbar functions in Windows 11 were just a bug, Microsoft has confirmed they’re intentional. The aim is to encourage people to use the Windows Widgets panel, instead.
Microsoft
The Windows 11 calendar pop-up is one of the more notable changes, as it no longer integrates with events or agendas. Pulling up the calendar form the Windows 11 taskbar will display the dates, but you won’t be able to add new events. On the Windows Feedback Hub, Microsoft has stated that “…there is a calendar option in the new widgets experience that you can use to quickly see your personal calendar and its events.”