Cloudbridge Mattermost 2.2.0 has been released with WordPress 6 support!
The Cloudbridge Mattermost WordPress plugin is verified with WordPress 6 and Mattermost 7, and now features even more Mattermost integrations (register new users and better handling of 2FA/MFA)!
Previous improvements include Cloudflare integration and OAuth2 authentication for logging into your WordPress sites
You can read more about it here:
It is available via the WordPress plugin repository and from GitHub