wpsmush-exclude-specific-files.php

<?php
/**
* Plugin Name: Wpsmush - Exclude Specific Attachments From Smushing
* Plugin URI: https://premium.wpmudev.org/
* Description: This plugin will help to exclude specific attachments from optimizing
* Author: Abdoljabbar Bakhshande @ WPMUDEV
* Author URI: https://wpmudev.com/profile/abdoljabbarbakhshande
* License: GPLv2 or later
*/

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Excludes an attachment from being smushed.
 *
 * @param  array $smush The smush data.
 * @param  int    $id The attachment ID.
 * @return array
 */
function exclude_attachment_from_smushing( $smush, $id ) {

    // Get the attachment IDs to skip smushing.
    $attachment_ids = [ 1 ]; // Example: array( 2, 4, 5 );

    // Check if the attachment ID is in the list of IDs to skip.
    if ( ! in_array( $id, $attachment_ids, true ) ) {
        return $smush;
    }

    // Update the attachment meta to indicate that it should be skipped from smushing.
    update_post_meta( $id, 'wp-smush-ignore-bulk', 1 );

    // Return false to indicate that the attachment should not be smushed.
    return false;
}

/**
 * Registers the filter.
 */
add_filter( 'wp_smush_image', 'exclude_attachment_from_smushing', 10, 2 );