Implement the Invoice and capture email content using API

Continuing the discussion from Implement the Invoice and capture email content using API:

When a customer fills this form to create the invoice , what information is sent to the customer in email, if we choose the email at the bottom of this page?

Does the customer receive the invoice link in the email? Does squareup send the invoice link?

Context : I am asking this question to get confirmation about the user journey. Let’s suppose, currently, the end user is receiving the link in the email . After our implementation , we get the invoice link in email and send it to the customer ( from our system). Are these two links the same?

Thank You!!