I'd have swear before there were more and even a more button at the bottom
Looks like someone vibecoded and pushed without a review. Been observing too many bugs across X, Cursor etc
I don't regularly check Ask HN so I'm uncertain that more should be listed, although I would expect so. But assuming you haven't, the correct place to contact is hn@ycombinator.com which can be found at the contact link at the bottom of the page.
It seems to be broken and showing non-Ask content. Bugs happen; email the site admins and they can fix it (footer Contact link).
I also only see 15, logged in or not. And it is also showing some posts besides Ask/Tell.
I never use this section, though.
Ride the shady web archiving engine that inexplicably seems to go in an out without a problem. Then download the rest of the internet.