Event listener for the category dropdown list on the Redwood page 'Create Non-Catalog Request'

Summary:

We are working on the Redwood page "Create Non-Catalog Request" and need to display the long description of the selected category when creating a requisition. This description is stored in a lookup, which we plan to access via an endpoint by sending the category name as a parameter to retrieve the corresponding information.

So far, we have successfully added the necessary service connection to consume the endpoint. However, we have been unable to identify the event that triggers when selecting or changing a category in the dropdown list, which prevents us from executing the service call at the right moment.