I have a requirement in AEM workflow to allow multiple users to be assigned as an Approver and Reviewer in workflow for page.
1. When Author requests the review of a page, move a workflow forward to the Reviewers to take approval from all designated reviewers, if any of the reviewer has any question they can put comments or post annotation and send it back to Author to update page accordingly.
2. Once all the Reviewer approves it , proceed it to next Approval step and get approval from all the designated approvers.