Based on this help article (under the Personal and Shared connections header) if I create a Nintex Connector using a Nintex Administrator account I should be able to see that Connector across the tenant.
I've created a "SharePoint Online: List & library" Connector on the root site of the tenant using a Nintex Administrator account however when I use the "Office 365 query list" action on a Site Collection in that tenant I don't see that Connector.
Am I missing a step?