MariaDB is not added to Server Components after switching from MySQL
MySQL server was replaced with MariaDB (https://support.plesk.com/hc/en-us/articles/214528465).
MariaDB should be added to Tools & Settings > Server Components.
For now, only "mysql - the component not installed" is shown
First of all try to Refresh Server components list. Second – only feature requests are allowed here, so we would appreciate if you post bugs and issues on our forum at https://talk.plesk.com/forums/reports.746/. We are closing this request, since it does not contain any feature suggestions.