thanks for taking the time to reply. i want to take a moment here to say that my title of "adding homehub" should really say "adding appletv".
not sure my question is answered. naming conventions that apple chose for this and that can make things more confusing than they need to be. so here's my situation.
I am owner of apple home network (my network of homekit and matter devices, etc) and i've assigned another member "admin" rights to add and edit accessories. that member (not i) purchased an appletv to use as the hub to connect as the smart things. They set up the new appletv using their phone and their credentials (they are also the *only* user and the default user).
However, when they go to assign it to a room, our expected rooms are not there. instead, what is there are new, default room that end up creating a new Home called MyHome and adds the appletv to that newly created home.
can a non-owner add an appletv to a room of an apple home where they have admin rights?
thanks!