As a funny side note, I cannot load https://xn--coronaprver-ngb.dk/ in Brave, which also seems to be confused by Internationalised domain names.
This is what I see:
> This server could not prove that it is xn--coronaprver-ngb.dk; its security certificate is from *.coronaprover.dk. This may be caused by a misconfiguration or an attacker intercepting your connection.
Edit: Hah! And HN is also guilty of being confused by this. My comment now says "xn-coronoprver-ngb" when viewed from the outside, but my comment field correctly says "coronaprøver" when editing the comment...
This is what I see:
> This server could not prove that it is xn--coronaprver-ngb.dk; its security certificate is from *.coronaprover.dk. This may be caused by a misconfiguration or an attacker intercepting your connection.
Edit: Hah! And HN is also guilty of being confused by this. My comment now says "xn-coronoprver-ngb" when viewed from the outside, but my comment field correctly says "coronaprøver" when editing the comment...