And also https://discuss.flarum.org/d/21666-single-sign-on-sso-with-wordpress-integration
Please take a moment to search on the forum, those are basically the first two (non-incompatible) results for "wordpress" under the Extensions tag https://discuss.flarum.org/?q=tag%3Aextensions%20wordpress
You can also find a list of extensions at https://flagrow.io/extensions
