Providing feedback on a subtask is done through adding comments or reactions.
To add a Reaction, hover over the subtask and click the emoji icon.
Select the right reaction to add and it will appear below the Subtask.
The Comment section is on the far right of the Task window.
It can be used like you were creating a Message.
Add any feedback or link specific subtasks in the comment to draw attention to the specific work being mentioned.
You can also mention a team member in the comment using the “@” symbol. Mentioning a member will send out an e-mail notification to that member.