Team Load cannot be shown

Sorry, just found it. It is in the plan details. Next Question: can this be made visible when showing the plan widget in a dashboard?

+1 for having clarified on where you could find this information.

Adding that if you're rather looking for the specific RTC OOTB report named: "Team Capacity" report and could not find it:
it's because it's part of the reports not deployed by default.
If you need them, you'd follow instructions enclosed in the following InfoCenter topic:
http://pic.dhe.ibm.com/infocenter/clmhelp/v4r0/index.jsp?topic=%2Fcom.ibm.rational.reporting.admin.doc%2Ftopics%2Ft_deploy_new_report_templates.html

Hope this helps.

Regards,
Stéphane