Reply To: custom members loop
To my knowledge, the time of the latest update isn’t recorded. The latest update info is stored in user meta. To get it you’d do something like:
$update = get_usermeta( $user_id, 'bp_latest_update' );
You then have the option to get either the activity ID or the content (no timestamp I’m afraid).
echo $update['id'];
echo $update['content'];
You can of course add your own user meta when somebody writes a status update. You could record a timestamp and then fetch it as described above.
See:
https://codex.wordpress.org/Function_Reference/update_user_meta
I think bp_activity_posted_update is the hook you’ll need.