Why is `systemctl --user` broken unless I run it using `su`?

In a recent Lubuntu 22.04 install, when running systemctl --user with user 1000 I get:

❯ systemctl status --user
Failed to connect to bus: $DBUS_SESSION_BUS_ADDRESS and $XDG_RUNTIME_DIR not defined (consider using --machine=@.host --user to connect to bus of other user)
❯ eval $(dbus-launch --sh-syntax)
❯ systemctl status --user
Failed to read server status: Process org.freedesktop.systemd1 exited with status 1

However, when using another user (1001), or the same user, via su $user, systemctl status --user works just fine. Data: - When the user 1001 has an active tty session (via su, ls /run/user shows 1001 and systemctl status user-1001.slice shows it active. - journalctl -u user-1000.slice shows no errors. - The problem is the same for newly created users. - Is user 1000 is 'delta', executing su delta (from delta's ssh session), and then systemclt --user, all works. Somehow, su creates the needed environment, but not ssh. What else can I do to debug the problem? Can I restore systemd status config to a fresh state?, or copy something from 1002 to 1001?