From un- +‎ archived.

unarchived (not comparable)

1. Not archived.
   • 2025 October 22, Matt Binder, “Wayback Machine archiving snapshots plummet”, in Mashable‎^[1], archived from the original on 24 October 2025:

     However, in the age of the internet, most newspapers, aside from the legacy media giants, have largely gone unarchived recently.

• nonarchived