How would I solve this in a way to allow my database to be firstly populated by woocommerce and then allow myself to make whatever changes I wish?

I am creating an e commerce mobile app using React Native, within this I have a server, the role of the server is currently to get products from the woocommerce APi, take only the fields I need : name, id, category,price, image and then add another field called 'favourite'(for my wishlist).

Everything was worked well until the getProducts method has a method that calls the woocommerce API and then pushes that to the database. Problem is that whenever I try to update an item to 'true' rather than 'false' within the favourite field. It populates but when I refresh the page which also recalls the API, it brings the 'favourite' field back to false, which it was initially initialised as in the server.

I present the code in question:

app.get("/getProductsForUser", async (req, res) => {
    const productDetails = {};
    const numberOfProducts = 25;
    api
    .get("products", {
      per_page: numberOfProducts, // 20 products per page
    })
    .then((response) => {
      // Successful request

      var key = "Products";
      productDetails[key] = [];
      var data;

      for (let index = 0; index < numberOfProducts; index++) {
        productDetails[key].push({
          id: response.data[index].id,
          name: response.data[index].name,
          image: response.data[index].images[0].src,
          price: response.data[index].price,
          favourite: false,
          category: response.data[index].categories[0].name,
        });
      }
      db.collection("users")
        .doc(req.query.userID)
        .collection("products")
        .doc("0")
        .set({ productDetails });

      res.send(productDetails);
    })

    .catch((error) => {
      // Invalid request, for 4xx and 5xx statuses
      console.log("Response Status:", error);
    })
    .finally(() => {
      // Always executed.
    });
});

If there is a way I can only call the above function once in the whole project (which is in nodejs by the way) and then after that only call from the database, that will help?