Where can I check to see if my listing was created on the sales channel?

Andrew

Navigate Listing > History>Listing Submission History to view listing submissions(New Listings and Listing Updates).
The listing submission can be reviewed to be sure that the listing was created on your sales channel correctly.
If the status of your listing is failed, there will be an explanation in the comments section for each listing attempt.
Your listing will have a Failed validation status. Make the appropriate changes By doubling clicking on SKU name.
After the appropriate changes have been made, click the action button and select save and submit to publish new listing or listing update.