What is port 4443 used for?

Is https://nextcloudpi.localdomain:4443 used for the admin panel?

I’ve never been able to log into it locally. What creds would I use, my admin account?

That isn’t a default port for Nextcloud.

Run the following command to get an idea which service is listening on that port:

# netstat -lnp | grep ":4443"

There is a different management page to configure other parts of the system:

thanks, just an update: the latest docs are hosted at docs.nextcloudpi.com