vc_import_post_meta

Fires when importing post meta during a template import. This hook runs after each post meta entry is added to the database via add_post_meta(), allowing you to perform additional processing on imported metadata.

Parameters

Parameter	Type	Description
$post_id	int	The post ID that the meta was added to.
$key	string	The meta key.
$value	mixed	The meta value.

Usage

add_action( 'vc_import_post_meta', 'wpb_process_imported_meta', 10, 3 );

function wpb_process_imported_meta( $post_id, $key, $value ) {
    // Process specific meta keys during import
    if ( '_wpb_shortcodes_custom_css' === $key ) {
        // Regenerate custom CSS cache for the imported post
        update_post_meta( $post_id, '_wpb_css_cache_updated', false );
    }
}

Source

File: include/classes/core/shared-templates/importer/class-vc-wp-import.php