To check the output for a specific product in the Channable export you can use a shortcode in the URL to preview the specific product ID.
Add the Product ID to the Channable output URL
Using the preview mode the URL will be like this; http://www.yourmagento2store.com/../55bey71aaxya0qjqv4renq
To export just a specific product ID you can add "/pid/ProductID" to the end of the URL
So to view the specific product with product ID 32 the final URL will be; http://www.yourmagento2store.com/../55bey71aaxya0qjqv4renq/pid/32