@Lucie :
Could you briefly provide

• Where this page would be accessed
• How the notability criteria for placeholder items is/could be established (just to be able to guess what a user will see on that page)

So far the plan is for it to be very similar to https://en.wikipedia.org/wiki/Special:AllPages even without the top part that let's you filter things. It's mainly for search engines to find the placeholder pages.
It can be found on the https://en.wikipedia.org/wiki/Special:SpecialPages
The notability criteria is set in the source code and is not editable by the community (atm it's an item has to have at least 2 sitelinks and 3 statements to be notable)

I suggest Special:WantedTopics, analogous to Special:WantedPages.

I'd not go for Special:WantedTopics because that implies there is actually an editor who wants articles for these items to be written. That is not necessarily true unlike for Special:WantedPages.

@Lydia_Pintscher Hm, right... Special:PotentiallyInterestingTopicsYouCouldWriteAbout?....

*lol* Yes! That's the winner!

In T145200#2630043, @Lydia_Pintscher wrote:

I'd not go for Special:WantedTopics because that implies there is actually an editor who wants articles for these items to be written. That is not necessarily true unlike for Special:WantedPages.

Special:SuggestedTopics?

We could also approach it from the other side and state the lack of an article, like
Special:MissingTopics or Special:MissingArticles. This feels like a good match to our notability criterion of two sitelinks, which, if I get it right, means that two other Wikipedias already have human-written articles on that topic.

It should be a variant of the Special:AllPages name and be a clear reference to Wikibase, so Special:AllRepoPages or Special:AllRemotePages or similar.

@Nemo_bis but it's not *all* pages, but just "notable" pages.