Lots of standard blog publishing software generates RSS feeds. For example, every Substack site I've ever seen has an RSS feed at "/feed". They don't tell you about it, but it's there if you want it. And the RSS aggregator I use, Newsblur, can automatically find most RSS feeds if you just give it the site's home page URL.
The issue isn't really that there aren't RSS feeds or that there aren't RSS feed readers. But it's easier to demonize Google for killing Reader (which they probably shouldn't have done) than it is to admit that reading info from RSS feeds just isn't mainstream behavior--and really never was but now there are more alternatives.