Add content to Woocommerce e-mails with ACF Fields

acf-fields-array.php

<?php
			$acf_field = array(
				'key' => 'woocommerce_emails',
				'label' => 'Woocommerce e-mails',
				'name' => 'woocommerce_emails',
				'type' => 'repeater',
				'layout' => 'row',
				'sub_fields' => array(
					array(
						'key' => 'id',
						'label' => 'Woocommerce Template ID',
						'name' => 'id',
						'type' => 'select',
						'choices' => array(
							'new_order' => 'New order',
							'failed_order' => 'Failed order',
							'customer_reset_password' => 'Reset Password (customer)',
							'customer_refunded_order' => 'Refund Order (customer)',
							'customer_processing_order' => 'Processing order (customer)',
							'customer_on_hold_order' => 'On Hold Order (customer)',
							'customer_note' => 'Note (customer)',
							'customer_new_account' => 'New Account (customer)',
							'customer_invoice' => 'Invoice (customer)',
							'customer_completed_order' => 'Completed Order (customer)',
							'cancelled_order' => 'Cancelled Order',
							'customer_estimate_order' => 'Estimate Order',
						)
					),
					array(
						'key' => 'email_content',
						'label' => 'Content',
						'name' => 'email_content',
						'type' => 'wysiwyg',
					),
				),
			),

woocommerce-email-hook.php

<?php
class Sample {
  public function __construct() {
    add_action('woocommerce_email_order_details', [ $this, 'add_woocommerce_email_content' ], 1, 4);
  }
  public function add_woocommerce_email_content( $order, $send_to_admin, $plain_text, $email ) {
    $email_settings = get_field('woocommerce_emails', 'option');
    foreach ($email_settings as $email_setting) {
      if ($email_setting['id'] === $email->id) {
        echo $email_setting['email_content'];
      }
    }
  }
}