Is a customer who signs up for the form from the landing page automatically added to the list?

Yes!

When a customer signs up for the form from the landing page, they are automatically added to the list under contacts.

Please note: in order to perform the automation, a consent field must be added to the landing page.

Pay attention to the language of the text and its direction - you can change the direction of the text on the top right, right to left or left to right

The text can be changed (see frame marked in green in the image below).

When finished, click the field update button at the bottom of the page