I use it too, and like it very much. My only complaint is the inability to filter content (say, by keyword or regex). But it's free, it's solid, and it syncs across all my devices. Big ups.

Does it sync across machines? If so that would be amazing

Edit: as in like, subscribed feeds. Obviously the feeds would update on both machines but would I need to add each feed to the app twice is what I meant to ask.

Yes it does.

And the read/unread state of posts syncs, as well. Between MacOS, iPadOS and iOS.

Yep NetNewsWire all the way. It syncs to iCloud. I use it to subscribe to important GitHub project releases, blogs, news, and even some YouTube channels.

same. it's a great product and the guy who runs it wants it to exist solely in the world to combat the algo.