Generate post title and post slug from ACF single value fields

functions.php

/**
* Generate post title and post slug from ACF single value fields
*
*/

add_action('acf/save_post', 'my_acf_save_post', 5);
function my_acf_save_post( $post_id ) {

    $post_title = 'My default title';
    $slug = 'my-default-slug';

    // Check if a specific field value was updated.
    // Replace field_key with the actual field keys of the fields
    if( isset($_POST['acf']['field_key1']) && isset($_POST['acf']['field_key2']) && isset($_POST['acf']['field_key3']) && isset($_POST['acf']['field_key4']) && isset($_POST['acf']['field_key5'])) {
        
        // Replace field_key with keys of the fields needed to generate title
        $post_title = $_POST['acf']['field_key1'] . ' ' . $_POST['acf']['field_key2'] . ' ' . $_POST['acf']['field_key3'] . ' ' . $_POST['acf']['field_key4'] . ' ' . $_POST['acf']['field_key5'];
        $slug = sanitize_title( $post_title );
    }

    // Grab Post Data from the Form
    $post = array(
        'ID'           => $post_id,
        'post_title'   => $post_title,
        'post_name'    => $slug,
    );

    // Update the Post
    wp_update_post( $post );
}