@Nidhi Priya, Thanks for posting in Q&A. In fact, Conditional Access is the feature in Azure AD. And based on my research, the role "Security Reader" has the permission to read conditional access for policies.
I notice the role is already assigned. Please go to Azure AD portal to double confirm the role is under "Assigned roles" of this user. Meanwhile, I notice using this feature requires Azure AD Premium license. Please ensure this license is also assigned to this user as well.
Hope the above information can help.
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