The IP seems to be in Norway, vaguely around Oslo, and owned by TerraHost. IANAL but I assume this means Lemmygrad could be taken down by either the hosting provider or Norwegian/EEA law. Someone more knowledgeable can probably answer how likely this is, but my guess is "not very".
As for your other question, no matter where this was hosted, the government of said country could probably take it down if it so wanted. All clearnet domains are under jurisdiction of either a national government (for .ml, this would be Mali) or ICANN, and physical servers obviously can be raided.
I do, however, doubt the Norwegian government cares enough about some marxists on the internet to go through the process of judicial approval for seizure of the servers, and the folks in Mali definitely have more pressing matters right now.
Yep this is right. I also do daily backups, so even if this host were to take us down, we'd probably only have a few-days down-time at most while we move to a new domain.
If we did move to a new domain how would we find out where we're moving to?
Likely it'd only be the server that would be taken down, which means the domain name would stay the same. But there are a few matrix channels, as well as the lemmyverse, that would tell ppl about a domain change.
Also sorry, there's two things, the server, and the domain name. Either could potentially be taken away, but neither would mean the death of this site.