Plugins such as the DirectPHP plugin, Include Content Item plugin and googleMaps plugin are what we called content plugins.
As the name suggests, a content plugin is for use specifically within a Joomla article, which is managed by the com_content component.
Can you run these plugins in your other components?
Running plugins in your component
Usually, a content plugin will not run in other components (it's originally designed to run within com_content only).
However, if you really want to run a content plugin within other components, you may still achieve this by adding a trigger in your component.
Below are some documentations on how to add triggers:
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