Hello Azhar,
Thank you for reaching out to the Microsoft Community!
As I understand you are looking for certificate for Windows 10 (Internet of Things) IoT Enterprise (Ent) 2021 Long-Term Servicing Channel (LTSC) End of life and service.
Please review the below information and follow the troubleshooting steps on your end to resolve this issue:
Windows 10 IoT Enterprise LTSC 2021 follows the Fixed Lifecycle Policy. Hence, it comes with defined support dates. The mainstream support for this version will be available until 12th of January 2027. The extended support though will continue until 13th of January 2032.
In case you need certification or official documentation about its lifecycle, please find the same on Microsoft's Lifecycle page at the below link:
Windows 10 IoT Enterprise LTSC 2021 - Microsoft Lifecycle | Microsoft Learn
Additionally, you could speak to your licensing support seeking assistance with your concern for detailed information. For more details on this inquiry, please find the same on the Official Help Page of Microsoft at the below links:
How to recognize Windows Enterprise 2021 LTSC from IoT and End Of - Microsoft Community
What is Windows IoT Enterprise? | Microsoft Learn
What's new in Windows 10 IoT Enterprise LTSC 2021 | Microsoft Learn
Please feel free to contact us and let us know if the above provided information and instruction resolved your issue. If so, please mark this thread as Answered. In case you still have the issue, or I misunderstood your issue, please revert to clarify or elaborate and provide us the above requested details so we can understand the issue and modify or provide more assistance accordingly.
Best Regards,
Bill
Microsoft Community Support Specialist