After receiving over a dozen notifications that people are requesting access to a sheet after receiving notifications about a rejection I did a little digging. Comments are used to give the rejection reason so users can correct and re-submit.
As of today, the comments are not being included in the notification. It is not unique to the one sheet either as I replicated the issue with a brand-new workflow on a scratch sheet.
At the moment this is not on the status page, so I wanted to make sure people were aware of the problem in case a short-term work around is needed.