Cordova Plugin Purchase - redirect after successful subscription

Question

I am using this plugin (https://github.com/j3k0/cordova-plugin-purchase) to handle a in app subscription.

iap.validator = "https://validator.fovea.cc/v1/validate?appName=XXX";

  //initiate initInAppPurchase function 
  useEffect(() => {
      const init = async () => {
          await initInAppPurchase();
      }
      init();

  }, []);

  //if on an ios or android device, then get product info 
  const initInAppPurchase = () => {
      if ((isPlatform('ios')) || (isPlatform('android'))) {
          iap.verbosity = iap.DEBUG;

          iap.register({
              id: "tpmonthly",
              alias: "Monthly",
              type: iap.PAID_SUBSCRIPTION
          });

          iap.ready(() => {
              let product = iap.get('Monthly');
              setPrice(product.price)
              setProduct(product)
          })

          iap.refresh();

      }
  }

  //if user clicks purchase button 
  const purchaseProduct = () => {
      if (product.owned) {
          alert('A subscription is currently active.')
      } else {
          iap.order('Monthly').then(() => {
              iap.when("tpmonthly").approved((p: IAPProduct) => {
                  p.verify();
              });
              iap.when("tpmonthly").verified((p: IAPProduct) => {
              p.finish();
              history.push("/ios-signup/");
              });
          })
      }
  }

return (
<Button size="large" variant="outlined" onClick={purchaseProduct}>Subscribe Monthly for {productPrice}</Button>
);

What I am hoping to get is that once the subscription is verified that it then redirects the app to /ios-signup/ .. this is not happening.

Is this code correct? And why would it not redirect after p.finish?