When a forum has hundreds of posts, and many pages. How do I immediately jump to the last page of posts, or reverse the order of the posts so I can see the latest ones?

Take a thread in clubhouse for example (Turboprop Aerobatic Plane, it flies) Many pages and replies (posts)

Click on the little arrow to the right on that topic it should take you to the latest post.

If that's what you are meaning,

the latest (most recent) posts are always shown first

According to the little arrow on the right of the topics, it says "go to latest post"
but when clicked it jumps to the last post made to the thread.

I just tried it on a thread I don't read and it jumped me to post 351 which was the last post at the time.

Maybe the pop up info bubble should say "Go to Last post" instead of Latest post