You can use the Displayed Fields option in manual queues to specify which fields appear for orchestration items when shown in a particular manual queue. You must specify the API names of the fields in this list so they appear at runtime.
If displayed fields are empty, the orchestration queue picks-up the above-mentioned fields by default.
The manual queue column headers use the Salesforce field labels.
Note
From release Spring '22, the Queue Items LWC component is available with improved UI and much of the same functionality as the older Manual Queue component. To use the newer component, add the Queue Items component to your Manual Queue page layout because it's not there by default (see Order Management LWC Components).