Yes, Tenant Admin User Details form will be hidden while updating/editing the Tenant Details, because Techcello allows Tenants to have more than 1 Administrators at a time for a given Tenant, hence it is difficult to allow editing of Tenant Admin User Details in the Edit Tenant Page, so editing tenant administrators is not allowed in the Edit Tenant screens.

To update Tenant Administrator's detail, Login to the respective Tenant Account with Tenant Administrator credentials, navigate to Access Control >> Manage Users and edit the user details.