Yes, we only see stuff from lemmy.bullshit to the point where lemmy.world were still in sync. So we can only see lemmy.world users interactions with post from lemmy.bullshit after the defederation. The same goes for them they can’t see lemmy.world users interactions either. because what lemmy.world users are interacting with is a copy (of lemmy.bullshits original post) and isn’t sending the updates back to lemmy.bullshit and the other way around, the original isn’t updating the copy.
I have been through the same. I can find a lot of tutorials on the super easy stuff but more advanced or just a bit more advance stuff is up to me to figuring out. It is so bad that i start with documentations first then try it out myself, then google problems. I do not checkout tutorials anymore, only if i am super new on the subject. Chat gpt has been a lot more helpful, either it helps me with the problem or give me hints on what to google for or try out.