ACF in WP API Response

acf-api-repsonse.php

<?php
/**
 * The functions to add all ACF types to the REST API responses.
 *
 * @link https://developer.wordpress.org/reference/hooks/rest_prepare_post_type/
 * @package theme-name
 */

/**
 * Add Options for Posts.
 */
add_filter( 'rest_prepare_post', function( $response ) {
	$response->data['acf'] = get_fields( $response->data['id'] );
	return $response;
} );

/**
 * Add Options for Pages.
 */
add_filter( 'rest_prepare_page', function( $response ) {
	$response->data['acf'] = get_fields( $response->data['id'] );
	return $response;
} );