That assumes that it's not abandoned like rammy.site was, if you don't know rammy.site was a general purpose Lemmy instance a while back which was abandoned by its admin and then some right-wing grifters decided to hijack it and use it to spread hatred. Similarly to this situation they also got defederated, though much more widely then in this case.

The biggest problem is that because they were abandoned eventually the server crashed or the VPS got discontinued or something and now it's gone. If you go to the URL now you get SSL errors and for a while it was showing up as 410 gone. So with Feddit.nl even though you can go and view the contents on it right now if it's abandoned it will likely meet a very similar fate in the near future. Meaning that the community is on it are doomed and will either die or have to migrate elsewhere.