From what I read on Wikipedia SDFE has changed its name to SDFI. I think we should update the source map names (the ones visible in editors) and update the OSM wiki to reflect that change.
Yes there are some clean up needed.
Link is to an old webpage https://download.kortforsyningen.dk/content/vilkaar-og-betingelser
maybe changed to https://dataforsyningen.dk/Vilkaar