I didn’t see this when it originally came up, but when reading it time my initial reaction was “Why duplicate all those references?”
There is a relationship using the post object field from the tutor to the course. Get the post ID of the related field from the course and then get the icon from the turor.
this may or may not work exactly as written, it’s just a quick example.
$course_id = get_field('post_object_field_name');
$icon = get_field('icon_field_name', $post_id);
