Assigned to field on team workflow board - Default (unassigned) user

What is the challenge?

When on the Team work board and selecting your team members in the 'Assigned To' field, unable to select 'Default Unassigned' user. We would like to be able to see all work assigned to the team but not assigned to a user on the team board.

What is the impact?

Team are then able to see what work is coming and can proactively pick up tickets from the 'Default Unassigned ' user bucket to work on.

Describe your idea

Add the 'Default Unassigned' user as an option to select from the 'Assigned to' field. And have it appear on the top of the workboard itself.