Is it possible to use this method to create a new record in a related table when a feature is created in a layer? If not, are there any method or series of methods that can be used to achieve this result?
I would have to verify, but I recall issues with the eventing, that the id to link to the related record is not available to the AA in the on create event.
The following GeoNet post looks to provide a good example of using the Create Linked Record method to generate a new record in the related table on creation of a new feature.
Attribute Assistant Create Linked Record
https://community.esri.com/thread/184150-attribute-assistant-create-linked-record
Hope this helps!
-Jared