Scenario: An Employee needs approval from managers
I create a rule that says whenever a user change a custom field to [Needs Review] the tasks goes to that section and creates an Approval sub-tasks with someone assigned to it.
What I would like is that whenever the assigned person to reviewing the tasks changes the status of the sub-tasks, the main (parent) tasks assignee can get a notification that their tasks has been approved by their manager.
It may be possible, with some limitations, to do that with an approval subtask, but a simpler way is…
Include in that custom field another stage like Review Passed. In the title of the approval subtask, instruct the manager to change the parent task’s custom field to Review Passed. You could include a rule to add a comment to @mention the assignee, if desired, or make the custom field trigger notifications on value changes.