https://www.drupal.org/community/contributor-guide/role/documentation-gu... →
If the guide currently has no maintainers and you are a Confirmed user on drupal.org, go to the Discuss page for the guide and click the link that says "Become a maintainer immediately.
I do not see such a link on a Guide that does not have a maintainer such as https://www.drupal.org/docs/develop/core-modules-and-themes → .
TBD
Update the page
Active
Correction/Clarification
Probably that part should be changed to suggest adding a comment on
🌱
Recruiting guide maintainers for documentation
Active
or asking on Slack.
Site moderators can administer most of the documentation guides; a comment in that issue or a post on Slack should do the task.
Thanks for the suggestion. I updated the page with your suggestion.