@Jane Hu - Welcome to Microsoft Q&A and thanks for reaching out to us.
When you are using Azure Lighthouse, it's important to note that the permissions field may not be available for certain role assignments authorized by a service provider. This is mentioned in the documentation for both Azure RBAC and Azure AD Privileged Identity Management**.**
If you would like to see which security groups are assigned to GDAP template you created, you can follow below steps:
- Sign in to the Azure portal.
- Select Azure AD Privileged Identity Management -> Azure AD roles.
- Select the role you want to view security group assignments for.
- Select Security groups.
- You should see a list of security groups assigned to the role.
Hope this helps. and please feel free to reach out if you have any further questions.
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