Hello @lokesh chouhan
Some users have encountered this sort of problem after performing a Windows update. If the Taskbar does not appear after an update, you can try restarting the File Explorer process on Windows 11.
-Press Ctrl + Shift + Esc on your keyboard to quickly launch the Task Manager.
-In the Task Manager window, click on the More details option to expand it.
-In the Process tab, scroll down to find Windows Explorer. Select it and then hit the Restart button at the bottom.
The workaround, for now, if the above methods are not helpful would be to uninstall the update and raise this via the feedback hub.
The Feedback Hub app lets you tell Microsoft about any problems you run into while using Windows 11.
https://support.microsoft.com/en-us/windows/send-feedback-to-microsoft-with-the-feedback-hub-app-f59187f8-8739-22d6-ba93-f66612949332
Hope this resolves your Query!!
--If the reply is helpful, please Upvote and Accept it as an answer--