Wix Studio CMS: Subquestions for questionnaire

Hey guys,

I have a collection of Questions for the users as a part of a questionnaire.
I have also created another collections called “Sub Questions”, as I want one of the questions to have a subquestion following the user’s response.

I have created said questions and subquestions and filtered them accordingly.
But, when I mark the subquestions as such, they still show as part of the main questions, yet I want them to show only if the user chooses a certain option.

What am I missing?

Thank you!