Is there any way to retrieve the information from the related table in MS power automate, not only the main feature layer? I only see the features from the main feature table when I built workflow.
The survey is in a web form all the time, not used as a field app.
There is an existing enhancement request similar to your issue:
ENH-000123510 Send related record information to webhook providers
I encourage you to contact Esri Support. Our Support team will assign an official enhancement number for your records. Similar requests from other customers can then be attached to the same enhancement request, which helps us assess demand for the enhancement and prioritize it accordingly.