The pull-through fields sourced from the Product_Metrics_vod do not display when adding a filter in Targets tab of My Plan in CRM iRep.
One reason for this issue is that the Applicable_Product_Metrics_vod field on the MC_Cycle_Product_vod object is blank.
The Applicable_Product_Metrics_vod field on the MC_Cycle_Product_vod object contains a comma-delimited list of pull-through fields sourced from Product_Metrics_vod.
Check the configuration requirements in the Related Documentation (below) and be sure that the Applicable_Product_Metrics_vod field is calculated and populated properly.
CRM Help Documentation: Supporting Pull-In Fields for MCCP