A quick way to see the roles assigned to a user or group in a subscription is to use the Azure role assignments pane.
In the Azure portal, select All services from the Azure portal menu.
Select Azure Active Directory and then select Users or Groups.
Click the user or group you want list the role assignments for.
Click Azure role assignments.
You see a list of roles assigned to the selected user or group at various scopes such as management group, subscription, resource group, or resource. This list includes all role assignments you have permission to read.
You can also achieve this with PowerShell.
Please click "Accept as Answer" if this helps