Hi @Colin_Perry,
The best option here would be to update your workflow to include another action. Right after the send of the transactional email, add a step to send an internal marketing email send, select the same automated email and specify the internal recipient.
(When you send an internal marketing email, HubSpot will populate the email with the information from the enrolled contact but you can specify another recipient email address.)
It’s not the exact same email (as in: it’s not a BCC), but it’s an exact copy of the email content.
HubSpot does have a compliance email feature but it can’t be limited to specific types of email sends: Use compliance copy emails
Best regards!