Include User Fields in Check Pending Admin email

my_pmpro_check_pending_admin_email_data_custom.php

<?php
/**
 * Include checkout data from pending order as email variables in the Check Pending Admin email.
 *
 * You can add this recipe to your site by creating a custom plugin
 * or using the Code Snippets plugin available for free in the WordPress repository.
 * Read this companion article for step-by-step directions on either method.
 * https://www.paidmembershipspro.com/create-a-plugin-for-pmpro-customizations/
 */
function my_pmpro_check_pending_admin_email_data_custom( $data, $email ) {

	if ( 'check_pending_admin' === $email->template ) {
		$invoice_id    = $data['invoice_id'];
		$pending_order = new MemberOrder( $invoice_id );
		pmpro_pull_checkout_data_from_order( $pending_order );

		// Your User Field meta keys.
		$meta_keys = array( 'company', 'facebook', 'bio' );

		foreach ( $meta_keys as $key ) {
			$keydata = isset( $_REQUEST[ $key ] ) ? sanitize_text_field( wp_unslash( $_REQUEST[ $key ] ) ) : '';

			if ( is_array( $keydata ) ) {
				$keydata = implode( ', ', $keydata );
			}

			$data[ $key ] = $keydata;
		}
	}

	return $data;
}
add_filter( 'pmpro_email_data', 'my_pmpro_check_pending_admin_email_data_custom', 10, 2 );