Yeah, not all sites have an rss feed or it’s hard to find. Here is a few tips:

• 1/Share the url with your rss reader, the reader can search for you. This doesn’t always work.
• 2/Add one of these to the site’s url /rss .rss /feed
• 3/If step 2 doesn’t work look for a “blog” or “news” tab and try steps 1 and 2 there.
• 4 When all else fails ask for feeds, making sure to state the topics you are interested in.

I have a lot of feeds for science, environment, privacy, a few for world news, technology, and health which I recently posted on Mastodon https://techhub.social/@bigtechblows/110527513586017980 Hopefully the link works.