Sure!
In the API-connector I substituted the whole JSON part that will loop with a handle like this (compare it with the picture in my first post and you will get the substitution):
So the “calculation_details” : [<calculation_details>]
And then in the workflow you find the repeating group or a list you want to parse in there and use :format_as_text
Then in the text field content you put in the whole expression that should loop, and just substitute the variables with “add dynamic content” lite this:
This way the JSON data gets in the correct way into the HTML template.
I hope this gave you some more info, sorry for the swedish variable names.