I'm reassessing the W3TC signature at the bottom of the forum pages:

<!--
Performance optimized by W3 Total Cache. Learn more:  https://www.boldgrid.com/w3-total-cache/ 

Object Caching 966/1596 objects using redis
Page Caching using redis (Requested URI is rejected) 
Lazy Loading
Database Caching using redis (Request-wide modification query)

Served from: xxx.xxxxxxxxxxx.com @ 2023-04-24 13:07:14 by W3 Total Cache
-->

So it seems it is not caching the page, but Object Caching and Database Caching (into Redis) may still be happening on the forum pages. Is there any guide for exclusions to apply within Object and Database caching with wpForo?