When comments are made on something (eg to dos) should the change appear on the dashboard?

As far as I can see someone can comment on a to do (and probably in a bunch of other places) but this update doesn’t appear on the dashboard. Is this intentional or a bug (feels like a bug to me, but you may have another perspective).

This is intentional, but I could see it could be a problem. Let me change the behavior early next year.

Thanks. It will be helpful to have this.