https://arstechnica.com/gadgets/2021/12/preview-builds-begin-to-fix-windows-11s-start-menu-and-taskbar/

Microsoft may have given the taskbar and Start menu a fresh coat of paint in Windows 11, but the updated look also came with new limitations. Microsoft appears to be listening to at least some of the ensuing complaints because the latest preview build of Windows 11 for Windows Insiders in the Dev channel includes some improvements to both the taskbar and the Start menu, among many other tweaks.

For example, the Windows 11 version of the taskbar won't show the time and date on all monitors in a multi-monitor setup, only on the primary monitor; in this preview build, the time and date show up on all monitors again. Hooray!