(Secondarily, I'm guessing some of the `type` attributes should probably be "atom" rather than "rss"?)
[0] https://github.com/outcoldman/hackernews-personal-blogs/blob...
I'm just using the file that someone else made, but I guess they didn't really make the distinction between those URLs in the code, though it shouldn't be too hard to modify: https://github.com/outcoldman/hackernews-personal-blogs/blob...
It is also true that there are both RSS, Atom and possibly other feed types mixed in there. What I did for my site was to crawl through all of those feeds and process them one by one: get all of the posts, do some ordering and grouping and output everything as RSS feeds in a consistent format.
For example, here's the top 100 user feeds for 2023: https://hn-blogs.kronis.dev/feed-top100.xml
Those have HTML links for each of the posts, though I'm afraid it's not exactly what you're asking for (the HTML URLs for the sites/feeds themselves), because I don't actually store that anywhere in my case, though the original feeds of the sites should have that information too.