How do I enable User 1 rights in minimal installation? I have Drupal 8 minimal installation profile and it does not seem to have provided super user status to the first admin account created during the installation process.

How do I enable it?
User 1 doesn't need any roles to have super user status. User 1 is exempted from the permissions system entirely. So, they automatically have all permissions, regardless of roles they may or may not have.