After subscribing to support feed not getting notified on replies.

The feed only picks up new topics. If you want to get notifications of all activity for your plugin, click the big “subscribe” button at the top of the topics page. See https://i.imgur.com/DRXVawu.png

Those will arrive via email; I’m not sure how you’d slack them.

Thanks for your reply. I will try to sync mail to slack then.