I am not sure, why you tried the redirect 😳

If you want to try to redirect, you should redirect /.well-known/webfinger to https://www.it-blogger.dk/wp-json/activitypub/1.0/webfinger.

Please do not redirect the complete /.well-known/ folder, because it might include extra, non WebFinger, informations.

The API endpoint seem to work fine: https://www.it-blogger.dk/wp-json/activitypub/1.0/webfinger?resource=acct:andreas@www.it-blogger.dk