Workflow API - create things by iteration through list of lists

Hi - I wanted to let you know I am have a good understanding of using workflow API by iterating through a list. I mostly learned it from @romanmg in Bubble.io API Tutorial: Schedule a Workflow on a List - YouTube.

However, I am not able to figure out how to use workflow API for iterating through list of lists. Here is the example:

I have a data type Team which can contain a list of team members (users). I have another data type SurveryQuestion which contains list of questions (text).

I now want to create a specific DataType MemberAnswers that basically shows a one-to-one mapping of members and their answers to each question.

List Team: John, Mat, Chris, Nick …
Questions: Q1, Q2, Q3 ,…
MemberAnswer: John Q1 A1, John Q1 A1… John Q2 A2,John Q2 A2,…

I was originally thinking I can do a cascaded workflow API call, but I figured I can’t pass the first API call to another workflow. Any thoughts?