After creating tenants via REST API, is it possible to get some aggregated reports about processing in those tenants or automatically have one and the same user to be a tenant administrator or share skills between tenants?
The created tenants are completely isolated from each other (except using one and the same subscription). There is no functionality to get any processing reports outside this or that tenant. There is no way to share skills between created tenants. All the permissions/users are also handled tenant by tenant. There is no "superuser" who has automatic access to all created tenants.