In a certification campaign, if a reviewer adds a comment to a link being certified and then rejects the link, then the comment does not show in the screens of the secondary approval process.
Release : 14.4
Component : SIGMA-Identity Suite
The purpose of the IP comments are the following.
1. You can add a comment when rejecting an item.
2. You can add comment when you reassign an item.
So the second reviewer/approver can see the Item details like previous owner and the comments in the reassign section. You can see the below screenshot.
The IG comments functionality is not implemented in the IP. If customer requires a comment functionality like IG, you need to raise a enhancement request for it.