I don't know. All of those sites seem to be small, personal passion projects. I'm sure that more than a few people with personal blogs submit to all of them
Personally, I think it has become difficult to find good blogs through Google alone.
My approach is to start from trust platforms such as LinkedIn, and look at people who have relatively senior or credible positions. Then I check whether they have a personal blog.
Good blogs often support RSS. My own blog, makonea, does not support it yet, but in general this is a useful signal.
So when I try to find good blogs on Google, I search for the topic together with keywords like “RSS.”
I don't. Except for long-tail keywords, Marginalia Search / Kagi Small Web / Wiby / Million Short are better options, or one of the many blog/small web directories that have made the frontpage in recent months.
https://theforest.link/
https://indieblog.page/
https://blogroll.org/
https://ooh.directory/
https://personalsit.es/
https://blogsearch.io/
My approach is to start from trust platforms such as LinkedIn, and look at people who have relatively senior or credible positions. Then I check whether they have a personal blog.
Good blogs often support RSS. My own blog, makonea, does not support it yet, but in general this is a useful signal.
So when I try to find good blogs on Google, I search for the topic together with keywords like “RSS.”