I'm looking for some help on updating the repeating section of a form with a new child node or entry.
I have an Order list and an items list. The Orders list has a repeating section of items hooked up to the Item list ID using a lookup.
When a user is creating a new item in the items list, I have the ability for them to automatically add this new item to an existing Order and intending to do this via the workflow on the Items list to update the Orders repeating section.
I can't seem to find any info on how to use the Update XML O365 function to add a new child node to the Orders repeating sections XML. First section of parameters asks for an XML Source - Existing SharePoint Content but I'm not sure what format this should be in or how to reference the field.
Any pointers much appreciated.