I use the following code to exclude expired posts and it works fine but it doesn't exclude expired sticky posts.

//* Exclude expired posts
add_action( 'pre_get_posts', 'exclude_expired_posts' );
function exclude_expired_posts( $query ) {

    if ( 
            !is_admin() 
         && $query->is_main_query() 
         && !is_search() 
         && !is_singular() 
         && !is_date() 
    ) { 

        $meta_query = array (
            'relation' => 'OR', 
            array( 
                'key'     =>'ed_expiry', 
                'compare' => 'NOT EXISTS' 
            ), 
            array( 
                'key'     => 'ed_expiry', 
                'value'   => current_time( 'mysql' ), 
                'type'    => 'DATETIME', 
                'compare' => '>',
            ),
        );
        
        $query->set('meta_query', $meta_query);
    }
}