Add Terms & Condtions in WooCommerce registration form

functions.php

add_action( 'woocommerce_register_form', function() {
    wc_get_template( 'checkout/terms.php' );
} );

add_action( 'woocommerce_process_registration_errors', function( $errors, $username, $password, $email ){
    if ( empty( $_POST['terms'] ) ) {
        throw new Exception( __( 'You must accept the terms and conditions in order to register.', 'text-domain' ) );
    }
    return $errors;
}, 10, 4 );