gerardnico If you mean syntax plugin, combo gives some stat: https://combostrap.com/docs/analytics/syntax_count Otherwise, you can just search your pages for the syntax of your plugins. If you don't find a plugin syntax, it's not used. For other plugin, I don't know of any monitoring facility in dokuwiki standard.
wikenigma If you log-in as an admin, and click through via the 'admin' menu to the 'extension manager' , the resulting page will show all installed plug-ins, plus whether they are enabled or not (it's possible to have a plug-in installed, but disabled )