All I get when I search that instance is Mullvad VPN. Can an admins also block specific communities within an allowed instance?

I think it was lemmy.dbzer0 (?) something along those lines. However when I use the tool to see defederated instances this one doesn’t show up, however I can’t find it when I search for it either.

Thank you! That explains a little. Follow up question: If the new instance has defederated or “blocked” some community that I am following on this instance, will I still be able to follow them if I import the saved file?