Dequeue CSS files conditionally

function remove_unused_css() {

    // Check if it's not the homepage or not a specific post type

    if ( !is_front_page() && !is_page('your-page-slug') ) {

        wp_dequeue_style('unused-stylesheet-handle');

        wp_deregister_style('unused-stylesheet-handle');

    }

}

add_action('wp_enqueue_scripts', 'remove_unused_css');