Custom Fields are not importing

I’m struggling to import my posts with custom fields. When I imported using WP All Import I followed all directions and mapped the import fields. The posts are imported but the only data imported for each post is the title. None of the custom fields are imported. They are standard WP custom fields, not ACF.

I even created a separate staging site with no plugins or any data other than a single post that I manually entered the custom fields so I could map them with WP All Import. When I imported, the same thing occurred. 20 posts were imported but only the titles were imported and no custom field data was imported.

I’m running WP 5.8 and Twenty-Twenty-One theme.