I don’t think so. It looks like docs.nextcloudpi.com is hosted on a different server.
It also looks like the actual content of docs.nextcloudpi.com is hosted here in the Nextcloud forums, and the script that is supposed to fetch and categorize the content is somehow broken, respectively it cannot access the content anymore. Maybe due to an update of Discourse? (the forum software used here)
I was expecting the ncp documentation site to be more organized than that, however (with links to user, admin, and developer manuals), in the same way that the regular nextcloud documentation page at https://docs.nextcloud.com/ is formatted.
I will look through the discourse links that you pointed to, but I’m wondering whether there is an all-in-one document for getting started with NextCloudPi that I am missing.
Edited to add: OK, I have found the relevant documents on the discourse forum, and should be ready to try it out this evening - thanks again…