I have just as much info as you do (very little haha) but I am under the impression the server is in Germany. I don’t think lemmy.world has any direct connection to the US.Please note that “think” is doing a lot of heavy lifting.
The issue is that if (more heavy lifting) these communities were banned without actual evidence of rulebreaking (and it seems that way) then the same argument could be used to ban a lot of communities. Any community based around copyrighted material has the plausible potential to contain links to copyright infringing media. Should they all be banned for that risk?