capbat I'm wasn't sure to understand what you mean but the red links show the problem.
capbat What is strange is that on both version Old and New the data/pages are the same, in both of those directories I only see alphabetical entries from A - P! so there is no entry there starting from letter Q - Z.
OK, so the page, say, "Smithsonian Ch. - Secrets Unlocked Series 1 (2019) Part 8 Spear of Destiny" does not appear in the new wiki but does appear on the old wiki. But you are unable to find a file name "smithsonian*txt" anywhere. ... weird.
This can only mean that you are not looking at the right place. The pages for your old wiki are not where you think they are. But your old wiki knows since it can show the files. So why not ask it ? You could for example create the file lib/tpl/arctic/meta.html
with this content
<?php
echo "<pre style='background-color:red; font-size: 200%'>";
echo hsc(wikiFN('there-i-am'));
echo "</pre>";
Then visit your old wiki, you'll get the answer.
id=nouveaute ? Tiens je me suis dit "ça cause français" ;-). Bonsoir de Brest, en Bretagne.