I’m registered with lemmy.zip, but I commented on a post in lemmy.world and it won’t seem to show up in the post, although it does show up in my comments list. Do some instances(?) block comments from other instances? Or is this a sub(?) thing?
I’m a pretty new reddifugee and still trying to get the hang of this. Feel free to correct my terminology, please.

I’ve been using Mlem on iOS and it makes it easy. I thought it was standard to see other instances. Unfortunately it also seems to have an issue with some comments, but I think I’m going to wait it out to see if they fix it. I tried a few other Lemmy apps and do not care for the look or set up.