Contact form with CMS

Can anyone help me with adding a CMS in the dropdown menu of this contact form? I want the items in the art shop to appear automatically when a new one has been added to the CMS.


Here is my public share link: https://preview.webflow.com/preview/galleriet-oslo?utm_medium=preview_link&utm_source=designer&utm_content=galleriet-oslo&preview=5c8d9a4228796d30d638a153ad7a340f&pageId=610bf2f67747fd7b9f45eef7&itemId=6138dcc566d3bf5fdf3d6a1a&workflow=preview