With no logstash (T233134), we're limited to logfiles on disk... So could be worth writing some scripts to do a bit of analysis and statistics from the beta StopForumSpam log files.
Sample raw log entry:
2021-01-01 01:01:01 [aaaabbbbCCCCddddEEEEffff] deployment-mediawiki-01 enwiki 1.36.0-alpha StopForumSpam INFO: 111.222.333.444 tripped SFS deny list doing createaccount by using 111.222.333.444 on "Special:CreateAccount".
{"action":"createaccount","clientip":"111.222.333.444","reportonly":true,"title":"Special:CreateAccount","user":"111.222.333.444"}