[xwiki-users] Pages in Navigator

Hi again, I am using an XWiki Enterprise 8.4.2 in a docker container and use the external data in a persisted volume. At this point, I am using no extra database for storing the entries, so I assume that an embedded database is used. I am trying to import content from a MediaWiki using MediaWiki XML, which works surprisingly well. However, none of the created pages appear in my navigation panel. I tried creating a new page, this did also not appear in navigation lists. Since I imported into a sub-wiki, i changed back to the unchanged main xwiki, but there are no pages there as well - not even the default pages. Skimming google for this kind of problem, I have often been sent to Extension:Navigation-Pages, and documents about hoe hidden pages are not displayed in said navigational tree - but as far as I can see, I am creating regular pages which are not hidden and non-terminal as well. Is there anything known about this issue and maybe how to resolve it?