Creating connected collectives is a manual process at the moment. If you want to do it, please contact us describing what you'd like.
Connected collectives are a way to display the different collectives or local projects that came out of your main initiative. Collectives are not strongly tied together:
They don't share the same budget
They can have different hosts, with different currencies
Admins of one Collective are not automatically admin of the other
On the Collective page, connected collectives will be displayed under More ways to contribute
Connected collectives feature works for Organizations and Users profiles too: