CMS sort by Reference Field

Design help CMS
1

I have a CMS that has a reference field to a list of Companies. I want to sort the CMS by Company Name but it doesn’t appear as an option. Am I missing something or is this not possible?

https://preview.webflow.com/preview/minimal-list?utm_medium=preview_link&utm_source=designer&utm_content=minimal-list&preview=1ba1770b6fa18ee24cc362e215ac492a&pageId=60a4df08116557a778568fd7&mode=preview

Here is my public share link: LINK
(how to access public share link)