2) An example Webhook Payload
By copying this JSON payload into the Webhook Payload section, I can now acess these data in the form of data pills in subsequent steps :
I do not see it appear in the App Data. Why?
When the data pills do not appear on the App Data section, reason is due to the fact that the sample response data could not be parsed correctly, as it may not be in a correct JSON format. There are JSON checkers online that allows you to check if a certain data is in the right JSON structure, which can be easily accessible and free to use.
Another reason may be that your webhook type is PUT/POST with XML or Form encoded Payload, in which case they should follow the XML format or the Form Encoded format.
If you are unsure if your data should be in XML or JSON format, here is an article that helps you distinguish between the two.