I don't think you can see another instance.
However that etherum instance would have communities/"subs". You can "join"/subscribe to those communities to see them from your original instance.
You can see in my screenshot some posts. You can see that Raleigh has posted to Diggit. You can clic on that "Diggit", and you'll get to this : https://diggit.xyz/c/diggit
This is the Diggit community from the Diggit.xyz instance.
You can join that community by going to your instance search, and putting this link in the search : https://diggit.xyz/c/diggit or [!diggit@diggit.xyz](/c/diggit@diggit.xyz).
That way you will join that community.
By doing so with each community you are interested in, you can join the different communities from that instance, post to them, and interact with them.
Why do you have to do that? Because lemmy/kbin... Are hosted on different servers, which don't directly scrap all the communities on all the servers.
So until someone on that particular instance has subsided to a community, that instance won't see the community.
