Search by "unanswered" or "unsolved"

I can’t find a way to search for unanswered post nor unsolved post.

It would be a nice feature.

By unanswered, I assume you mean topics with only one post?

That is what I mean, yes.

For a complete list: https://discourse.paraview.org/top/all?ascending=true&order=posts
You can save it as a bookmark.

This link was reached by clicking on “Top”, then clicking on the sorting by replies twice, so that it reverses the order, then you can choose the category and/or time span.
All of these controls are at the top part of the website, when you enter this Discourse website via PC. I haven’t checked what it looks like on smartphone…

This is okay, but not definitely not great.