This may be useful for folks looking to expand their feed. I discovered this on accident and it completely revolutionized my experience on Kbin.
To view all of an instance's posts, just use https://kbin.social/d/[instance domain here]
This appears to work for all Kbin instances, most Lemmy instances, and some Mastodon instances (this may have to do with their federation with kbin.social - I'm uncertain). Other platforms may work as well. Some examples:
Just hit the button to subscribe, and the entire instance is in your feed. It also provides a nice jumping off point to explore and subscribe to specific communities on that instance.
When you use this technique with a list like what's available from the Fediverse Observer, it really widens the reach of your feed and your ability to participate across the Fediverse.