Hi @Salam ELIAS
This link you shared seems to be 3 years old as shown in below image therefore I would strongly advise against using it as the main source of reference "https://github.com/Azure/Microsoft-Defender-for-Cloud/blob/main/Onboarding/Modules/3-Policy-Management.md#step-3---assign-and-customize-the-mdc-default-policy"
Please refer to Microsoft official documentation to learn more about Microsoft Defender for Cloud?