How to append an specific attachment to subtasks

[Phil Stabl]

Hey, I’m using Jira Automation and I want to append an attachment that meets a certain condition to all subtasks of an issue.

The trigger is a new attachment being added to the issue. I don’t want to replace the existing attachments on the subtasks — I just want to add the new attachment while keeping all existing attachments.

I already have the attachment that meets the conditions; I just don’t know how to add it to the subtasks.

Is there a way to achieve this with Jira Automation?