Comment 1 for bug 1871356

So it seems this is actually always been the behavior when any mode other than "all" is selected.
I think the reason is that only "all" mode assumes the maas database is being initialized, therefore asking for additional configurations (first admin, external auth config, ...).

When running as "region" or "region+rack", the command currently doesn't know whether it's a new install or a new region is being added.