I’d like to request to have a user that can create companies and add users only. So the Admin does not need to do this.
We can create a new user with the Administrator role.

Yeah, i was hoping to do that but that is not possible, yet.
My bad. I understood it differently. In this case, i was hoping that we could setup a role that could be a semi-admin, which can create company and new user, but not see previous companies already in the system.
That is impossible. You should install a separate instance of Manager for that.
i would say it’s not impossible. It depends, I in my opinion, whether the developers see it as valid and whether it is aligned to the software direction.
btw, i have cloud subscription. i don’t agree with installing separate instance of manager.
It would require separate data-folders. You are with one license allowed unlimited businesses but not unlimited data-folders or Manager instances. Indeed it would cost you more to do so and that would make business sense, otherwise you could resell complete Manager instances without the developer benefitting. The only way the Developer makes money is by selling licenses for Server and Cloud editions and the only restriction posed is that you have one Instance with Admin(s) and User(s) per instance.