Order not searchable

Orders in the orders tab on the WP Dashboard are not searchable. I tried searching by the email of the user, user name and the order number. I’ve solved this on my own by adding the following code into functions.php incase anyone needs it.

function idsearch( $wp ) {
    global $pagenow;
    if ( $wp->extra_query_vars['post_type'] == 'llms_order') {
        // If it's not the post listing return
        if( 'edit.php' != $pagenow )
            return;

        // If it's not a search return
        if( !isset( $wp->query_vars['s'] ) )
            return;

        // If it's a search but there's no prefix, return
        if( '#' != substr( $wp->query_vars['s'], 0, 1 ) )
            return;

        // Validate the numeric value
        $id = absint( substr( $wp->query_vars['s'], 1 ) );
        if( !$id )
            return; // Return if no ID, absint returns 0 for invalid values

        // If we reach here, all criteria is fulfilled, unset search and select by ID instead
        unset( $wp->query_vars['s'] );
        $wp->query_vars['p'] = $id;
    }
}
add_action( 'parse_request', 'idsearch' );