function llms_rest_get_all_error_statuses( $wp_error ) {
	$statuses = array();

	if ( is_wp_error( $wp_error ) && ! empty( $wp_error->has_errors() ) ) {
		/**
		 * The method `get_all_error_data()` has been introduced in wp 5.6.0.
		 * TODO: remove bw compatibility when min wp version will be raised above 5.6.0.
		 */
		global $wp_version;
		$func = ( version_compare( $wp_version, 5.6, '>=' ) ) ? 'get_all_error_data' : 'get_error_data';

		foreach ( $wp_error->get_error_codes() as $code ) {
			$status = $wp_error->{$func}( $code );
			$status = 'get_error_data' === $func ? array( $status ) : $status;
			/**
			 * Use native `array_column()` in place of `wp_list_pluck()` as:
			 * 1) `$status` is fors ure an array (and not possibly an object);
			 * 2) `wp_list_pluck()` raises an error if the key ('status' in this case) is not found.
			 */
			$statuses = array_merge( $statuses, array_column( $status, 'status' ) );
		}
		$statuses = array_filter( array_unique( $statuses ) );
	}

	return $statuses;

}