To my knowledge, this isn't an option. There are some ideas out there you can upvote but last I heard they aren't making updates to the proofing engine that currently exists as they are moving towards a more integrated approval option for documents.
There was a note on this post from the product team regarding a workaround for using proofs and document approvals together, which would likely allow you to report out document reviewers.
Proof Reviewer Report - Adobe Experience League Community - 729990