A while back I built a site that converts RSS feeds to ActivityPub actors that you can subscribe to from Mastodon and other ActivityPub-compliant social networks: https://bots.tinysubversions.com/convert/
I've now also published the source code: https://github.com/dariusk/activtypub-to-rss
@darius Thank you! I've just added a few blogs I follow using it.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko