Currently, three wikis are still configured to use Graph extension with the capability to store graph informations in specialized namespaces pages:

• collab
• mediawiki.org
• zero

We should check if collab and zero use it, and consider a maintenance task on mediawiki.org to move the last namespace pages in templates or linline in graph tag.

Previous discussion for some context:

In T97027#1237874, @Dereckson wrote:

In T97027#1237819, @Yurik wrote:

... No need to wait, but please don't use Graph namespace
(might want to disable it in config for new wikis)

...
@Yurik and me discussed the feature on the Gerrit change and on IRC. In a nutshell, we disabled the possibility for new wikis to use namespaces, and also, following @Krenair suggestion, for wikis still not using them.]