How Child Themes Directory works for plugins?

Plugins are not kept in the theme directory. It doesn’t matter if you are using a child theme or not. Maybe you’re asking a different question? Are you asking how to make a “child-plugin”?

Plugins are generally kept here: wp-content/plugins.

Whereas child themes and themes are kept here: wp-content/themes

As far as “child-plugins” there is not an official way to do it, but I think this article sums up pretty nicely what you could do to accomplish that, https://iandunn.name/the-right-way-to-customize-a-wordpress-plugin/ .

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