Can't find the custom product forms data

I have created a custom form to a product adding some fields. Where does Squarespace store my data from the submitted custom forms?

Data Storage and Retrieval

You store form submission data in the chosen storage option during the set-up of a Form Block. The common destinations for form submissions include email, Google Drive, and Squarespace Email Campaigns. To retrieve this data, you simply access the storage service where you initially configured the form to send submissions.

• Email: Submissions are sent to a specified email address.

• Google Drive: Responses are collected in a linked Google Sheet.

• Email Campaigns: Data can be used to create mailing lists within Squarespace.

There are not custom product forms in the list of forms in the Contacts (screen2). And I do not see any options to connect forms to Google sheet or so (screen 1). If you show me a way to do it I would appreciate that.