Explanation
Box 1: Infrastrucrue Svcs
Infrastrucrue Svcs is a Premium workspace.
If users have a free license and the workspace is stored in Premium (dedicated) capacity, they will be able to view and interact with the content in that workspace.
If users have a free license and the workspace is stored in shared capacity (not premium), they will not be able to see the content in shared workspace, only "My workspace".
If users have pro license, they will be able to view and interact with the content in that workspace.
Box 2: Admin
We need to activate the Orpaned workspace.
An orphaned workspace is one that does not have an admin assigned.
If you're a Service Admin, you can now view all of your organization's workspaces through the Admin Portal in the user interface.
Graphical user interface, table Description automatically generated with medium confidence

It's easy to Recover an orphan from this screen. Simply select the workspace and click Recover, then add yourself or another user as an admin.
Reference:
https://community.powerbi.com/t5/Service/Difference-between-Public-and-Private-workspace/m-p/1382219
https://docs.microsoft.com/en-us/power-bi/admin/service-admin-portal-workspaces