We have dozens of active users collectively commenting on hundreds of Issues daily using the comment section below Issues as the main portal to discuss and resolve issues, so we urgently need to be able to find and filter activity by comments to monitor and manage this. When sorting issues by 'updated on' or 'updated by' this does NOT include activity within comments, so there is no way for us to see which issues have been commented on most recently. We urgently need this feature as arguably it is very valuable to be able to see which issues users are actively engaging with. We would also want to be able to search by who has commented, what was said in the comment (to be captured within the search result when searching for key words within Issues) and by tagged people in the comments.