I found this solution, but I can't understand how it works:
In Survey we have 'SurveySection' section API which can used to render survey. So, you can configure 'SurveySection' section by passing survey name parameter in Flow action
I can't find "SurveySection", could you explain in details how cat I do it, Please. What I need is to add to my assignment a Pega Survey to send it into the mail to external user. When I send any section it works, but I need to send my created Survey.