Hello,
Why have one site for support and then another as a forum?
You could try to make a support category, add the solved plugin, tags and add a dedicated support group where users can send their info they don’t want shared publicly. This can be done… Isn’t the whole point of a forum to bring communities together so you’re basically sending them away when it can be dealt with in one place. See the Support category here for inspiration. Additionally, Discourse customers get support via private message. Imagine if you asked Discourse a question and they sent you to a freshdesk support ticket site. It’s not a ‘welcoming’ approach to users as they are being turned away.
It’s no different to another site?
Just my thoughts.