Woo 6.3.0 AR page fix

functions.php

<?php

add_filter( 'woocommerce_is_rest_api_request', 'simulate_as_not_rest' );
/**
 * Mock REST request as frontend to load cart session.
 *
 * Since WooCommerce 6.3.0
 *
 * @param bool $is_rest_api_request
 * @return bool
 */
function simulate_as_not_rest( $is_rest_api_request ) {
	if ( ! $is_rest_api_request ) {
		return $is_rest_api_request;
	}

	// Bail early if this is not our request.
	if ( false === strpos( $_SERVER['REQUEST_URI'], '/cart' ) ) {
		return $is_rest_api_request;
	}

	return false;
}