Code snippet to hide non-UPS shipping services if a customer selects an Access Point at Checkout. Work with PluginHive WooCommerce UPS Shipping Plugin: https://www.pluginhive.com/product/woocommerce-ups-shipping-plugin-with-print-label/

gistfile1.txt

add_filter('woocommerce_package_rates', 'wf_hide_shipping_method_if_accesspoint', 10, 2); 
function wf_hide_shipping_method_if_accesspoint( $available_shipping_methods, $package ){
    global $woocommerce;
    $shipping_accesspoint = WC()->customer->__get('shipping_accesspoint');
    
    if( !empty($shipping_accesspoint) ){
        $decoded_accesspoint = json_decode($shipping_accesspoint);
        if(isset($decoded_accesspoint->AddressKeyFormat)){
            if( !empty( $decoded_accesspoint->AddressKeyFormat->AddressLine ) ){
                foreach ($available_shipping_methods as $shipping_method => $value) {
                    if( strpos( $shipping_method, 'wf_shipping_ups' ) == false ) {
                        unset($available_shipping_methods[$shipping_method]);
                    }
                }
            }
        }
    }
    return $available_shipping_methods;
}