In MUX, the Forecast value under Staffing Plan page shows 0 for all the resources even though they have allocations.
The Forecast Columns is calculated based on Allocation Hours X Forecast Rate.
When you click on the resource, the fly out menu will have the Forecast Rate column.
https://techdocs.broadcom.com/us/en/ca-enterprise-software/business-management/clarity-project-and-portfolio-management-ppm-on-premise/15-9-3/using/new-user-experience-request-resources-and-roles-to-staff-investments.html