App does not appear in Shopify
Sometimes, the app code is not populating on user's website using the automatic installation.
Step 1:
Check the website if you see their apps. If you see only token but did not see the script.
Step 2: Open the app on a standalone page and reinstall the app to the page where the app is supposed to be installed.
If this does not help. Installing the app manually should fix the issue. Kindly see the link below for more information.