Would you also appreciate an easier way to find replies to your own comments?
I'm not the original commenter, but I am a screen reader user who works in accessibility.
Unfortunately, I don't have too many good examples; the problem of hierarchical commenting systems being difficult to navigate is common across the web. There is a Reddit client for iOS, Dystopia[1], that does this extremely well for users of the built-in screen reader, VoiceOver[2], by allowing entire threads/subthreads to be collapsed and/or skipped over. On the web, you'd want to look into using hierarchical headings, nested lists and the like, to allow the structure to be conveyed semantically. HN is inexcusably bad at this, as there isn't a single heading anywhere on the site.
[1] https://www.reddit.com/r/DystopiaForReddit/ [2] https://support.apple.com/guide/iphone/turn-on-and-practice-...