How to call widget by widget’s id?

Question

You can display the specified widget using the_widget. It takes the class name of the widget as an argument (not ID), so you’ll need to know that info to use it, but this allows you to use a widget outside the sidebar.

If you’re looking to run some code based on the presence of a plugin, you want to use is_active_widget, which does take the ID as a parameter.

foreach( $widgets_list as $item ) {
    if ( is_active_widget( false, false, $item, true ) ) {
        //do your thing
    }
}