You can use this page to find communities across Lemmy instances: https://lemmyverse.net/.

At the time of writing these seem to be the ones related to Norway:

Norge:

• https://feddi.no/c/norge
• https://feddi.no/c/norge@lemmy.world
• https://feddi.no/c/norge@lemmy.ml
• https://feddi.no/c/norge@nrsk.no
• https://feddi.no/c/norge@sh.itjust.works

Norway:

• https://feddi.no/c/norway
• https://feddi.no/c/norway@nrsk.no
• https://feddi.no/c/norway@lemmygrad.ml