Team workload question

Hi!
I want to manage my team’s workload but as there are many team mates I want to see it by team not by individual. Is there any way that I can do this?
Plus, I noticed that if a team member is not assigned to any task during specific time, then the team member is not shown in the workload widget. Do you know how to list all the team members in the workload widget even if they’re not assigned to any task?