IIRC in the live environment, the password for the "nixos" user is also "nixos"

That was the first thing I tried.

TTY1(?) and what I see elsewhere say that the password is empty.

sponsorship by Anduril

Oof.

IIRC, when I went into a TTY while on the lock screen, I was already working as the nixos user. Is that what you're asking?

I'll try to find the time. However, I can't say I'm organised and willing enough to engage outside of socialist spaces to guarantee doing so.