I'd already gave a try to this extension several month ago yes, probably with early beta of Flarum.
This is php flarum info :
Flarum core: 1.7.2
PHP version: 7.3.33
MySQL version: 5.7.26-log
Loaded extensions: Core, date, libxml, openssl, pcre, sqlite3, zlib, bcmath, bz2, calendar, ctype, curl, dom, hash, fileinfo, filter, ftp, gd, gettext, gmp, SPL, iconv, session, intl, json, ldap, mbstring, standard, pcntl, PDO, mysqlnd, pdo_sqlite, pgsql, Phar, posix, Reflection, imap, SimpleXML, soap, sockets, sodium, pdo_mysql, exif, tidy, tokenizer, wddx, xml, xmlreader, xmlwriter, xsl, mysqli, geos, imagick, mailparse, mcrypt, memcache, memcached, mongodb, OAuth, PDFlib, propro, raphf, ssh2, timezonedb, uploadprogress, xmlrpc, yaz, zip, http, ionCube Loader
+----------------------+---------+--------+
| Flarum Extensions | | |
+----------------------+---------+--------+
| ID | Version | Commit |
+----------------------+---------+--------+
| flarum-flags | v1.7.0 | |
| flarum-tags | v1.7.1 | |
| flarum-suspend | v1.7.0 | |
| fof-oauth | 1.3.0 | |
| flarum-approval | v1.7.0 | |
| v17development-seo | v1.8.0 | |
| ianm-synopsis | 1.2.2 | |
| fof-user-directory | 1.2.3 | |
| fof-share-social | 1.1.2 | |
| fof-recaptcha | 1.1.1 | |
| fof-polls | 1.3.0 | |
| fof-links | 1.1.3 | |
| fof-best-answer | 1.2.5 | |
| flarum-subscriptions | v1.7.0 | |
| flarum-sticky | v1.7.0 | |
| flarum-statistics | v1.7.0 | |
| flarum-pusher | v1.7.0 | |
| flarum-nicknames | v1.7.0 | |
| flarum-mentions | v1.7.0 | |
| flarum-markdown | v1.7.0 | |
| flarum-lock | v1.7.0 | |
| flarum-likes | v1.7.0 | |
| flarum-lang-french | v4.8.1 | |
| flarum-emoji | v1.7.0 | |
| flarum-bbcode | v1.7.0 | |
+----------------------+---------+--------+
Base URL: https://www.flarum.fr/support
Installation path: /home/clients/440651efa077926db06b61d64304e0c4/web/support
Queue driver: sync
Session driver: file
Scheduler status: Ne jamais exécuter
Mail driver: smtp
Debug mode: off