WordPress SEO v12.7.1 was released on 12th December 2019. It has now been parsed.

Note: You might have noticed that the blog posts on subdomains weren’t always created when a new version was parsed. The most recent version that had been parsed before this was 12.6.2, November 2019. This was the version released after the Black Friday fun and games.

I’ve also updated the documentation for both the blocks:

FAQ – yoast/faq-block
List your Frequently Asked Questions in an SEO-friendly way. You can only use one FAQ block per post.

How-to – yoast/how-to-block
Create a How-to guide in an SEO-friendly way. You can only use one How-to block per post.