Add a privacy policy notice to the withdrawal form

functions.php

<?php

add_action( 'eu_owb_woocommerce_return_request_form_before_submit', function() {
    echo '<p class="eu-owb-privacy-notice">By submitting this form, I agree to the <a href="https://my-shop.com/privacy-policy">privacy policy</a>.</p>';
} );