I should not have to reorganize the scale of my workspace simply to be able to send email updates on subitem statuses. These two workarounds were suggested by customer support - “You would need to change the workflow of the board hierarchy where subitems are items, items become groups and groups become separate boards to support what I believe you want to do. Another option here is that if the email can wait until all subitem tasks are complete, you can have a two-automation process where one automations changes the status of the main item when all subitems are complete and have the main item status trigger an email.”
