This one is checked via an API call. You do need a URL of the product page you want to check.
Another thing you need is your project ID, you can find it in your project at https://app.datatrics.com/project/settings.
The last important value is your API key. You can generate your personal API key over here: https://app.datatrics.com/account/api-keys.
This is a recommended Google Chrome extension to make the data more readable: https://chrome.google.com/webstore/detail/json-viewer/gbmdgpbipfallnflgajpaliibnhdgobh
The API call you need is:
If it returns the related item present in Datatrics, the product page recognition is set up correctly. If not, please make sure you have content connected to Datatrics and if the URL in those items match.