This release brought the "Gutenberg" block experience to the entire website, not just posts and pages.
If you are already running an older version of WordPress, the simplest method is to go to Dashboard > Updates in your admin panel and click "Update Now". wordpress 5.9 download
For a manual installation, you can find the specific version on the WordPress Release Archive. This release brought the "Gutenberg" block experience to
You can download the core files as a .zip or .tar.gz package from WordPress.org. Major Features in WordPress 5.9 wordpress 5.9 download
Testing Full Site Editing and Twenty Twenty Two - Brian Coords
You can download WordPress 5.9 through several official channels depending on your needs: