Forms - WP Developing

How can I add additional filters to my filter form?

Directories –> [Your Directory] –> Content Types –> Listing –> Manage Views –> Manage Filters.
For more details, see the documentation.

Append ?bundle=[listing_post_type_name] to the URL of the add listing page.

For example, https://yourdomain/add-directory-listing?bundle=directory_dir_ltg

You can find the listing post type name in Directories –> [Your Directory] –> Content Types –> Name Column.