cache-exclusion.php

<?php
add_filter( 'rwmb_meta_boxes', 'dgtl_register_meta_boxes_cache_exclusion' );

function dgtl_register_meta_boxes_cache_exclusion( $meta_boxes ) {
    $meta_boxes[] = [
        'title'   => 'Cache Control',
        'id'      => 'cache-control',
        'post_types' => [
            'post',
            'page'
        ],
        'context'    => 'side',
        'fields'  => [
            [
                'type' => 'switch',
                'name' => esc_html__( 'Exclude from Cache', 'online-generator' ),
                'id'   => 'cache_exclusion',
                'desc' => esc_html__( 'Selecting this option will exclude this post from the cache. Select this if the post includes a complex form like payment processing.', 'online-generator' ),
            ],
        ],
    ];

    return $meta_boxes;
}

function dgtl_exclude_from_cache() {
    if (get_post_meta($post_id, 'cache_exclusion', true)) {
    header( 'do-not-cache: true' );
    }
}
add_action( 'send_headers', 'dgtl_exclude_from_cache' );