@Aayushi Solanki Query API supports management groups as a scope as well. However, we do not support management groups that contain MCA subscriptions.
Refer to the documentation below:
Management group scope parameters are documented here - https://learn.microsoft.com/en-us/rest/api/cost-management/query/usage#uri-parameters
Management group query sample request - https://learn.microsoft.com/en-us/rest/api/cost-management/query/usage#managementgroupquery-legacy
Hope this helps!
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