Users can upvote their own posts, yet they don't by default upon posting them. Reddit, for comparison, continues to allow users to remove their own-post upvotes, but upvotes them for the user by default. Other forums like Stack Overflow disallow own-post upvoting.
This forum has the worst of both worlds, for users can gain an algorithmic advantage by upvoting their own. It might seem like a minor issue, because it is. But it's an issue in my eyes regardless.
If you do file any bugs on this topic, post your bug numbers here, just for the record.
@DTS Engineer, I've posted it at https://feedbackassistant.apple.com/feedback/14937243. However, immediately after doing so, I noticed that the GUI of this forum is conspicuously similar to that of Discourse.
Consequently, I expect that this domain is actually a modified version of Discourse, and that this would be better reported upstream. Though, of course, because this instance includes downvotes - which most instances don't - this might irrespective be another useful customisation.