Relationship between Alexandrite and Lemmy.world ? - eviltoast

Recently started using Alexandrite and am really enjoying the experience, but have questions.

I’m thinking of Alexandrite as the chocolate shell over my lemmy.world ice cream cone. Alexandrite is not an instance, correct?

I have not found a place on Alexandrite where my subscriptions (joined communities) are listed. Is this not yet available?

I assume that if I join a community in one (either Alexandrite or Lemmy.world) it will sync with the other. True?

I’ve joined communities in Alexandrite, but they don’t show in the list of subscribed communities in lemmy.world. That just may take more time. Yes?

Thanks!