Add custom page to the vendor dashboard

// Hook into the navigation 

add_filter( 'wcv_pro_dashboard_urls', 'add_test_page_nav', 9 );

function add_test_page_nav( $pages ){ 

	$pages[ 'test_page' ] = array(

		'slug'    => 'test_page',

		'id'      => 'test_page',

		'label'   => __( 'Test Page', 'wcvendors-pro' ),

		'actions' => array(

			'edit'      => __( 'New', 'wcvendors-pro' ),

		),

	);

	return $pages;

}

// Create the custom page 

add_action( 'wcv_pro_dashboard_custom_page', 'add_test_page', 10, 4 );

function add_test_page( $object, $object_id, $template, $custom ){ 

	if ( 'test_page' === $object ){ 

		echo "<h1>New Test Page</h1>";

	}

}