Forums in Scroll Viewport

We are using Scroll Versions and Viewport to power a customer support and best practice portal.  We are interested in adding a Community forums experience - very similar to your Community here (which appears to be powered by ZenDesk).  https://k15t.zendesk.com/hc/en-us/community/topics

We had evaluated the Confluence add-on "Forums for Confluence".  It worked fine in native Confluence, but functionality failed when accessed via Viewport.

What suggestions/recommendations can you offer to your customers that want to create a Community forum type of experience in Viewport?