Looking at the finalized #FEP 1b12 it seems that there is no explicit definition for what object type a forum topic/thread would fall under. kbin and lemmy both send as:Page which is handled generically by other implementors (as it should). Its omission in the FEP may be completely intentional...
Could send as:OrderedCollection but real-world usage suggests this it's too low-level; worst-case scenario it might get rejected outright 🤷
