In order to be able to see your products/collections, you will need to set-up your JCurve mobile app 'Available' on Shopify end.
To do it, let's have a look and follow these following steps:
1. Go to your Shopify account and click on the 'Products'
2. On the next page, click on the product you want to set as 'JCurve Available'
3. Upon clicking on the Product, on the next page you will be able to see the 'Manage' option
4. On the Pop-up, simply click on the checkbox for the JCurve mobile app and press "Done" to save the process.
Feel free to reach us in case you have any questions. :)