Hello [shivendra],
Recently even I had the same Problem. There is a simple fix for this if you are in a school or work in a place where you have a Microsoft 365 student account for Microsoft Word, Excel etc You might have allowed your organisation to manage your device that
means your work or school account has been connected to your desktop but there is nothing to worry about.
This is how to disconnect the school account and enable windows hello:-
- Go to Change account Settings
- Click on this button.👇

Then click on the Work or school account and click on Disconnect.
Then go to sign-in options. There you go Problem solved now you can use Windows Hello Pin, Fingerprint and Face but the next time you open a Microsoft app It will show you that you are logged out. There is nothing to worry about it just login again and this
time make sure to uncheck the allow my organisation to manage my device Box and click on
No Sign in to this app only and there you go all done. IF THERE IS ANY PROBLEM IN THIS PROCESS DO REPLY I WILL MAKE SURE TO HELP YOU