Conditionally load acf scripts

blocks.php

<?php
/**
 * Blocks setup
 *
 * @link https://www.advancedcustomfields.com/resources/options-page/
 */

namespace WhiteleyDesigns\Blocks;

/**
 * Load blocks
 */
function load_blocks() {

     $blocks = scandir( get_template_directory() . '/blocks/' );
     $blocks = array_values( array_diff( $blocks, array( '_base', '.DS_Store' ) ) );

     if ( ! empty( $blocks ) ) {
          foreach( $blocks as $block ) {

               $editor_script = [];

               // regsiter block scripts if they exist (must register script before block)
               if ( file_exists( get_template_directory() . '/blocks/' . $block . '/block.js' ) ) {

                    $deps = [
                         'acf',
                         'jquery'
                    ];

                    if ( $block == 'slideshow' ) {
                         $deps[] = 'wd-flickity';
                    }

                    wp_register_script(
                         'block-' . $block . '-js',
                         get_stylesheet_directory_uri() . '/blocks/' . $block . '/block.js',
                         $deps,
                         WD_THEME_VERSION,
                         false
                    );

                    $editor_script = [
                         'editor_script' => 'block-' . $block . '-js'
                    ];
               }

               // register the block
               register_block_type(
                    get_template_directory() . '/blocks/' . $block . '/block.json',
                    $editor_script
               );
          }
     }
}
add_action( 'init', __NAMESPACE__ . '\load_blocks', 5 );


/**
 * Load frontend scripts only if block exists on page
 */
function load_frontend_scripts() {

     if ( is_singular() && function_exists( 'load_frontend_block_scripts' ) ) {
          load_frontend_block_scripts();
     }
}
add_action( 'wp_enqueue_scripts', __NAMESPACE__ . '\load_frontend_scripts' );

helpers.php

<?php
/**
 * Load frontend scripts helper
 */
function load_frontend_block_scripts() {

     $blocks = scandir( get_template_directory() . '/blocks/' );
     $blocks = array_values( array_diff( $blocks, array( '_base', '.DS_Store' ) ) );

     if ( ! empty( $blocks ) ) {
          foreach( $blocks as $block ) {

               // regsiter block scripts if they exist (must register script before block)
               if ( file_exists( get_template_directory() . '/blocks/' . $block . '/block.js' ) && has_block( 'wd/acf-' . $block ) ) {
                    wp_enqueue_script( 'block-' . $block . '-js' );
               }
          }
     }
}