One thing which annoys me with lot of these tech blogs are that they don’t support RSS. I would like to subscribe and read them as lot of these information are generally a good read and learning.

To be fair, they have a neat feature to subscribe for their new posts by email but somehow RSS is harder?

RSS is essentially dead, sadly. Can't push ads or gather analytics through it so it's been "optimised out" of the web.

Even those rare sites that DO support RSS quite often only show the first paragraph or even just the title of the page, which I suppose is an acceptable compromise.

I use rssbridge for sites without a feed, and the feediron plugin for ttrss for sites whose feed is incomplete.

https://github.com/RSS-Bridge/rss-bridge https://github.com/feediron/ttrss_plugin-feediron https://git.tt-rss.org/fox/tt-rss