Overview Security and setup warnings how to fix /.well-known/carddav

I have some warnings that I was not aware of
One of them was about the phone region which I fixed.
DAV5 Contacts/Calendar sync seems to working on android etc.
I don’t know what the effects of these warnings are but I would like to fix them.

I’m running nextcloud 22
Ubuntu 20.04 server with snap install of nextcloud.

Nginix proxy/reverse proxy setup and trafficking ports 80/443 to nextcloud server.

location /.well-known/caldav {
    return 301 $scheme://$host/remote.php/dav;

Certbot put a few things in here for me and it looks ok.

Overview looks like this:
Screenshot (138)

Please advise