[ZFH]

Possibly misreading you, but updates behave differently in LTSC. It stays at the same level (1809 in LTSC) until the next major release and just auto-installs (very quickly, in between reboots and without forced prompts) security updates every couple of weeks or so.

[stinos]

Hmm. Machine is gone so I cannot check again, but pretty sure if I'd go to the Windows Update window it would say the standard 'updates are available' or similar and have a clickable 'Download and install'.