Contact summary fields in app forms

It looks like information from Contact Summary can be used in app forms. Do app forms have access to contact summary information for contacts higher in their lineage? For example… could I use information from a CHW Area’s contact summary in a form that applies to household members?

I can’t think of a way to make this work. From the documentation…

Note that these fields are not available when editing a previously completed form, or when accessing the form from outside of the profile page.

This suggests to me that the contact summary is the one that’s loaded up on the Contact page you’re viewing when you load the form, which in your example would be the household member.