Hi Karim Ihab Sadek,
Welcome to Microsoft Community.
The enabling of device encryption relies on the OEM-supplied hardware to fulfill the encryption conditions.
If your device has ever had device encryption enabled, it indicates that device encryption should be available at the hardware level.
Security considerations for Original Equipment Manufacturers (OEMs) | Microsoft Learn
The content in this thread describes a similar situation.
"Device encryption" setting in Windows 11 Home has disappeared - do I - Microsoft Community
For the original poster, he would need to make the device encryption option available again by re-enabling the BIOS configuration associated with the device.
| Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology. <br>If you are going to modify BIOS Settings, please back up all your personal files first to ensure you do not lose data. |
|---|
If I misunderstand your situation, feel free to correct me and share the information.
Best Regards,
Kyo - MSFT | Microsoft Community Technical Support