WordPress Full Site Editing ( FSE ) theme summary
In June 2021 there were only 7 Full Site Editing themes published on WordPress.org. Today there are 32, the most recent theme being Zelia.
I have now catalogued these themes, along with several others which are available from GitHub, including Twenty Twenty Two, which will be released as the default theme bundled with WordPress 5.9.
PS. 25th January 2022
There are now 44 FSE themes 44 themes on WordPress.org. View FSE themes wordpress.org