Phoca Filter Options System plugin version 3.0.1 has been released. It is Joomla! CMS plugin which adds the ability to filter parameters in configuration options.
See:
Phoca Filter Options System plugin - Joomla! 3.9:
There is a pull request to add this feature into the Joomla! 4 core:
If you find any bug, please report it in Phoca Forum page.