Be able to send a confirmation email (autoresponder) to the person who fills out a form every single time they fill out the form. Currently we have to set this up through a Customer Journey. But a contact can only go through a journey once. So, if they come back to a form again and fill it out again, they will not get a confirmation email.

The confirmation email on any form should be sent to the responder every single time they fill out the form, no matter how many times they fill it out.

This is standard form/marketing automation functionality.