I use https://sumi.news - it has both a chronological feed of all posts, and a list of only the recent post for each feed. Also it gives you an email to follow newsletters with.

Miniflux is my RSS reader of choice.

ActivityPub is a complicated protocol, but I still implemented ActivityPub support into my blog.

Me too!! The only thing I wish Miniflux did is newsletters.

I'm using a Miniflux instance.