Also, is there a way to only see posts here on this (kbin.social) instance?

I don’t believe so, anyone in federated instances can reply to or create a post in a magazine on this instance. But by default when you browse (and subscribe to) magazines you’re only doing so to ones on this instance.

If you’ve subscribed to a community on another instance you’re probably already aware of it, and you can both identify which ones are outside, and browse individual subscriptions by going to Settings –> Subscriptions. See below that I’m mostly only subscribed to local magazines on this instance, but I’m also subscribed to a Lemmy community and it’s very easy to distringuish.https://i.imgur.com/ot7iHJQ.png