How do doctype and child tables be used as sub fields and sub sub fields?

[justmejust2]

I made this new topic in the forum :

https://discuss.frappe.io/t/how-doctype-and-child-tables-could-be-used-as-sub-fields-and-sub-sub-fields/120678

But unfortunately there is no solution that could help to solve the problem
as in described in the above pic
i am creating custom app in which one form or Doctype must accept data fields as following
outcome is main field and contain many outputs as sub fields each of these output sub fields may contain many sub fields which are activities and indicators and so on ? how to solve it ?
how Doctype and child tables could be used as sub fields and sub sub fields ?
thank you.