Hi, Abinash Bir
Welcome to the Microsoft community.
Please check if Copilot works properly on the web to ensure that your current IP location supports Copilot. Then, try creating a new Windows account to see if the issue is specific to your current account, which might have caused the feature to be removed.
Manage user accounts in Windows - Microsoft Support
If the problem persists, I recommend performing an In-Place Upgrade to repair the system and see if that resolves the issue.
In-place upgrade which will refresh your Windows files and operating system without removing files or applications. That being said, we always recommend that if you have important data, you should back it up before making large system changes. If you want to back up your data first, please do so. Once you are done backing up, you can follow the steps in the following guides:
How to run In-place upgrade in Windows 11 - Microsoft Community
Best regards
Tommy Jin | Microsoft Community Support Specialist
