How to edit SEO metadata for Obsidian Publish?

How to I edit the SEO metadata for the Obsidian Publish site and pages?

There’s nothing in the docs and this thread just links to a post that has been removed

Sorry, announcements were moved to the blog on Obsidian’s website. You can find that one at Obsidian Publish now offers more for less: a lower price, with new features, improved SEO and accessibility - Obsidian but it doesn’t answer your question.